diff --git a/.gitignore b/.gitignore
index ad33c954a..b12728167 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,10 +19,6 @@ bin/
 electrum_data
 .DS_Store
 
-# icons
-electrum/gui/kivy/theming/atlas/*.png
-electrum/gui/kivy/theming/atlas/*.atlas
-
 # tests/tox
 .tox/
 .cache/
diff --git a/.gitmodules b/.gitmodules
index bf2df0362..9f1c76c1d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "electrum/www"]
 	path = electrum/www
 	url = https://github.com/spesmilo/electrum-http.git
+[submodule "electrum/gui/kivy/theming/atlas"]
+	path = electrum/gui/kivy/theming/atlas
+	url = https://github.com/spesmilo/electrum-kivy-atlas
diff --git a/.travis.yml b/.travis.yml
index 1673eba77..5907a4632 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -70,9 +70,7 @@ jobs:
       services:
         - docker
       install:
-        - pip install requests && ./contrib/pull_locale
-        - ./contrib/make_packages
-        - sudo docker build --no-cache -t electrum-android-builder-img contrib/android
+        - ./contrib/android/build_docker_image.sh
       script:
         - sudo chown -R 1000:1000 .
         # Output something every minute or Travis kills the job
diff --git a/contrib/android/Dockerfile b/contrib/android/Dockerfile
index 3442e593b..6401a7002 100644
--- a/contrib/android/Dockerfile
+++ b/contrib/android/Dockerfile
@@ -1,6 +1,6 @@
 # based on https://github.com/kivy/python-for-android/blob/master/Dockerfile
 
-FROM ubuntu:20.04
+FROM ubuntu:20.04@sha256:86ac87f73641c920fb42cc9612d4fb57b5626b56ea2a19b894d0673fd5b4f2e9
 
 ENV DEBIAN_FRONTEND=noninteractive
 
@@ -20,7 +20,8 @@ RUN apt -y update -qq \
 
 
 ENV ANDROID_NDK_HOME="${ANDROID_HOME}/android-ndk"
-ENV ANDROID_NDK_VERSION="19c"
+ENV ANDROID_NDK_VERSION="22b"
+ENV ANDROID_NDK_HASH="ac3a0421e76f71dd330d0cd55f9d99b9ac864c4c034fc67e0d671d022d4e806b"
 ENV ANDROID_NDK_HOME_V="${ANDROID_NDK_HOME}-r${ANDROID_NDK_VERSION}"
 
 # get the latest version from https://developer.android.com/ndk/downloads/index.html
@@ -31,6 +32,7 @@ ENV ANDROID_NDK_DL_URL="https://dl.google.com/android/repository/${ANDROID_NDK_A
 RUN curl --location --progress-bar \
         "${ANDROID_NDK_DL_URL}" \
         --output "${ANDROID_NDK_ARCHIVE}" \
+    && echo "${ANDROID_NDK_HASH} ${ANDROID_NDK_ARCHIVE}" | sha256sum -c - \
     && mkdir --parents "${ANDROID_NDK_HOME_V}" \
     && unzip -q "${ANDROID_NDK_ARCHIVE}" -d "${ANDROID_HOME}" \
     && ln -sfn "${ANDROID_NDK_HOME_V}" "${ANDROID_NDK_HOME}" \
@@ -42,6 +44,7 @@ ENV ANDROID_SDK_HOME="${ANDROID_HOME}/android-sdk"
 # get the latest version from https://developer.android.com/studio/index.html
 ENV ANDROID_SDK_TOOLS_VERSION="6514223"
 ENV ANDROID_SDK_BUILD_TOOLS_VERSION="29.0.3"
+ENV ANDROID_SDK_HASH="ef319a5afdb41822cb1c88d93bc7c23b0af4fc670abca89ff0346ee6688da797"
 ENV ANDROID_SDK_TOOLS_ARCHIVE="commandlinetools-linux-${ANDROID_SDK_TOOLS_VERSION}_latest.zip"
 ENV ANDROID_SDK_TOOLS_DL_URL="https://dl.google.com/android/repository/${ANDROID_SDK_TOOLS_ARCHIVE}"
 ENV ANDROID_SDK_MANAGER="${ANDROID_SDK_HOME}/tools/bin/sdkmanager --sdk_root=${ANDROID_SDK_HOME}"
@@ -50,6 +53,7 @@ ENV ANDROID_SDK_MANAGER="${ANDROID_SDK_HOME}/tools/bin/sdkmanager --sdk_root=${A
 RUN curl --location --progress-bar \
         "${ANDROID_SDK_TOOLS_DL_URL}" \
         --output "${ANDROID_SDK_TOOLS_ARCHIVE}" \
+    && echo "${ANDROID_SDK_HASH} ${ANDROID_SDK_TOOLS_ARCHIVE}" | sha256sum -c - \
     && mkdir --parents "${ANDROID_SDK_HOME}" \
     && unzip -q "${ANDROID_SDK_TOOLS_ARCHIVE}" -d "${ANDROID_SDK_HOME}" \
     && rm -rf "${ANDROID_SDK_TOOLS_ARCHIVE}"
@@ -61,7 +65,8 @@ RUN mkdir --parents "${ANDROID_SDK_HOME}/.android/" \
 
 # accept Android licenses (JDK necessary!)
 RUN apt -y update -qq \
-    && apt -y install -qq --no-install-recommends openjdk-13-jdk \
+    && apt -y install -qq --no-install-recommends \
+        openjdk-11-jdk-headless \
     && apt -y autoremove
 RUN yes | ${ANDROID_SDK_MANAGER} --licenses > /dev/null
 
@@ -74,14 +79,16 @@ RUN ${ANDROID_SDK_MANAGER} "platforms;android-24" > /dev/null && \
 
 # download ANT
 ENV APACHE_ANT_VERSION="1.9.4"
+ENV APACHE_ANT_HASH="66d3edcbb0eba11387705cd89178ffb65e55cd53f13ca35c1bb983c0f9992540"
 ENV APACHE_ANT_ARCHIVE="apache-ant-${APACHE_ANT_VERSION}-bin.tar.gz"
-ENV APACHE_ANT_DL_URL="http://archive.apache.org/dist/ant/binaries/${APACHE_ANT_ARCHIVE}"
+ENV APACHE_ANT_DL_URL="https://archive.apache.org/dist/ant/binaries/${APACHE_ANT_ARCHIVE}"
 ENV APACHE_ANT_HOME="${ANDROID_HOME}/apache-ant"
 ENV APACHE_ANT_HOME_V="${APACHE_ANT_HOME}-${APACHE_ANT_VERSION}"
 
 RUN curl --location --progress-bar \
         "${APACHE_ANT_DL_URL}" \
         --output "${APACHE_ANT_ARCHIVE}" \
+    && echo "${APACHE_ANT_HASH} ${APACHE_ANT_ARCHIVE}" | sha256sum -c - \
     && tar -xf "${APACHE_ANT_ARCHIVE}" -C "${ANDROID_HOME}" \
     && ln -sfn "${APACHE_ANT_HOME_V}" "${APACHE_ANT_HOME}" \
     && rm -rf "${APACHE_ANT_ARCHIVE}"
@@ -94,6 +101,7 @@ ENV WORK_DIR="${HOME_DIR}/wspace" \
 
 # install system/build dependencies
 # https://github.com/kivy/buildozer/blob/master/docs/source/installation.rst#android-on-ubuntu-2004-64bit
+# TODO probably need to pin versions of at least some of these for over-time reproducibility?
 RUN apt -y update -qq \
     && apt -y install -qq --no-install-recommends \
         python3 \
@@ -110,7 +118,6 @@ RUN apt -y update -qq \
         unzip \
         build-essential \
         ccache \
-        openjdk-13-jdk \
         autoconf \
         libtool \
         pkg-config \
@@ -144,15 +151,9 @@ RUN chown ${USER} /opt
 USER ${USER}
 
 
-RUN python3 -m pip install --user --upgrade pip
-RUN python3 -m pip install --user --upgrade wheel
-RUN python3 -m pip install --user --upgrade cython==0.29.19
-RUN python3 -m pip install --user --pre kivy
-RUN python3 -m pip install --user image
-
-# prepare git
-RUN git config --global user.name "John Doe" \
-    && git config --global user.email johndoe@example.com
+COPY requirements-build-android.txt /opt/deterministic-build/
+RUN python3 -m pip install --no-dependencies --user \
+    -r /opt/deterministic-build/requirements-build-android.txt
 
 # install buildozer
 RUN cd /opt \
@@ -161,8 +162,8 @@ RUN cd /opt \
     && git remote add sombernight https://github.com/SomberNight/buildozer \
     && git fetch --all \
     # commit: from branch sombernight/electrum_20210421
-    && git checkout "c17ac3618334c9936253e8f5b88dce43dc4da75b^{commit}" \
-    && python3 -m pip install --user -e .
+    && git checkout "d570116e88184b0eca0c6b59a25edd49d977da23^{commit}" \
+    && python3 -m pip install --no-dependencies --user -e .
 
 # install python-for-android
 RUN cd /opt \
@@ -170,9 +171,9 @@ RUN cd /opt \
     && cd python-for-android \
     && git remote add sombernight https://github.com/SomberNight/python-for-android \
     && git fetch --all \
-    # commit: from branch sombernight/electrum_20210421
-    && git checkout "5356bc7838b03c8c174c91fe01539c91d1b40b9f^{commit}" \
-    && python3 -m pip install --user -e .
+    # commit: from branch sombernight/electrum_20210421b
+    && git checkout "cdee188f0ef28ff8452207da409912da19e917ca^{commit}" \
+    && python3 -m pip install --no-dependencies --user -e .
 
 # build env vars
 ENV USE_SDK_WRAPPER=1
diff --git a/contrib/android/Makefile b/contrib/android/Makefile
index b5ddbc34c..9768d6b2d 100644
--- a/contrib/android/Makefile
+++ b/contrib/android/Makefile
@@ -1,5 +1,14 @@
+SHELL := /bin/bash
 PYTHON = python3
 
+# for reproducible builds
+export LC_ALL             := C
+export TZ                 := UTC
+export SOURCE_DATE_EPOCH  := $(shell git log -1 --pretty=%ct)
+export PYTHONHASHSEED     := $(SOURCE_DATE_EPOCH)
+export BUILD_DATE         := $(shell LC_ALL=C TZ=UTC date +'%b %e %Y' -d @$(SOURCE_DATE_EPOCH))
+export BUILD_TIME         := $(shell LC_ALL=C TZ=UTC date +'%H:%M:%S' -d @$(SOURCE_DATE_EPOCH))
+
 # needs kivy installed or in PYTHONPATH
 
 .PHONY: theming apk clean
diff --git a/contrib/android/Readme.md b/contrib/android/Readme.md
index d7632fbba..da2e2fe2b 100644
--- a/contrib/android/Readme.md
+++ b/contrib/android/Readme.md
@@ -5,8 +5,8 @@ To generate an APK file, follow these instructions.
 
 ## Android binary with Docker
 
-✗ _This script does not produce reproducible output (yet!).
-   Please help us remedy this._
+✓ _These binaries should be reproducible, meaning you should be able to generate
+   binaries that match the official releases._
 
 This assumes an Ubuntu (x86_64) host, but it should not be too hard to adapt to another
 similar system. The docker commands should be executed in the project's root
@@ -24,24 +24,27 @@ folder.
 2. Build image
 
     ```
-    $ sudo docker build -t electrum-android-builder-img contrib/android
+    $ ./contrib/android/build_docker_image.sh
     ```
 
-3. Build locale files
+3. Build binaries
 
-    ```
-    $ ./contrib/pull_locale
-    ```
-
-4. Prepare pure python dependencies
+    It's recommended to build from a fresh clone
+    (but you can skip this if reproducibility is not necessary).
 
     ```
-    $ ./contrib/make_packages
+    $ FRESH_CLONE=contrib/android/fresh_clone && \
+        sudo rm -rf $FRESH_CLONE && \
+        umask 0022 && \
+        mkdir -p $FRESH_CLONE && \
+        cd $FRESH_CLONE  && \
+        git clone https://github.com/spesmilo/electrum.git && \
+        cd electrum
     ```
 
-5. Build binaries
-
+    And then build from this directory:
     ```
+    $ git checkout $REV
     $ mkdir --parents $PWD/.buildozer/.gradle
     $ sudo docker run -it --rm \
         --name electrum-android-builder-cont \
@@ -52,6 +55,7 @@ folder.
         electrum-android-builder-img \
         ./contrib/android/make_apk
     ```
+    
     This mounts the project dir inside the container,
     and so the modifications will affect it, e.g. `.buildozer` folder
     will be created.
@@ -125,3 +129,22 @@ $ adb shell
 $ run-as org.electrum.electrum ls /data/data/org.electrum.electrum/files/data
 $ run-as org.electrum.electrum cp /data/data/org.electrum.electrum/files/data/wallets/my_wallet /sdcard/some_path/my_wallet
 ```
+
+### How to investigate diff between binaries if reproducibility fails?
+```
+cd bin/
+unzip Electrum-*.apk1 -d apk1
+mkdir apk1/assets/private_mp3/
+tar -xzvf apk1/assets/private.mp3 --directory apk1/assets/private_mp3/
+
+unzip Electrum-*.apk2 -d apk2
+mkdir apk2/assets/private_mp3/
+tar -xzvf apk2/assets/private.mp3 --directory apk2/assets/private_mp3/
+
+sudo chown --recursive "$(id -u -n)" apk1/ apk2/
+chmod -R +Xr  apk1/ apk2/
+$(cd apk1; find -type f -exec sha256sum '{}' \; > ./../sha256sum1)
+$(cd apk2; find -type f -exec sha256sum '{}' \; > ./../sha256sum2)
+diff sha256sum1 sha256sum2 > d
+cat d
+```
diff --git a/contrib/android/build_docker_image.sh b/contrib/android/build_docker_image.sh
new file mode 100755
index 000000000..3eae956c5
--- /dev/null
+++ b/contrib/android/build_docker_image.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -e
+
+CONTRIB_ANDROID="$(dirname "$(readlink -e "$0")")"
+CONTRIB="$CONTRIB_ANDROID"/..
+
+cp "$CONTRIB/deterministic-build/requirements-build-android.txt" "$CONTRIB_ANDROID/requirements-build-android.txt"
+sudo docker build -t electrum-android-builder-img "$CONTRIB_ANDROID"
+rm "$CONTRIB_ANDROID/requirements-build-android.txt"
diff --git a/contrib/android/buildozer.spec b/contrib/android/buildozer.spec
index 3a31468ff..43d505352 100644
--- a/contrib/android/buildozer.spec
+++ b/contrib/android/buildozer.spec
@@ -26,7 +26,9 @@ source.exclude_dirs = bin, build, dist, contrib,
     packages/qdarkstyle,
     packages/qtpy
 # (list) List of exclusions using pattern matching
-source.exclude_patterns = Makefile,setup*
+source.exclude_patterns = Makefile,setup*,
+    # not reproducible:
+    packages/aiohttp-*.dist-info/*
 
 # (str) Application versioning (method 1)
 version.regex = APK_VERSION = '(.*)'
@@ -79,7 +81,7 @@ android.api = 29
 android.minapi = 21
 
 # (str) Android NDK version to use
-android.ndk = 19c
+android.ndk = 22b
 
 # (int) Android NDK API to use (optional). This is the minimum API your app will support.
 android.ndk_api = 21
@@ -96,6 +98,18 @@ android.sdk_path = /opt/android/android-sdk
 # (str) ANT directory (if empty, it will be automatically downloaded.)
 android.ant_path = /opt/android/apache-ant
 
+# (bool) If True, then skip trying to update the Android sdk
+# This can be useful to avoid excess Internet downloads or save time
+# when an update is due and you just want to test/build your package
+# note(ghost43): probably needed for reproducibility. versions pinned in Dockerfile.
+android.skip_update = True
+
+# (bool) If True, then automatically accept SDK license
+# agreements. This is intended for automation only. If set to False,
+# the default, you will be shown the license when first running
+# buildozer.
+android.accept_sdk_license = True
+
 # (str) Android entry point, default is ok for Kivy-based app
 #android.entrypoint = org.renpy.android.PythonActivity
 
diff --git a/contrib/android/make_apk b/contrib/android/make_apk
index c7a9a2415..788bd5656 100755
--- a/contrib/android/make_apk
+++ b/contrib/android/make_apk
@@ -3,25 +3,42 @@
 set -e
 
 CONTRIB_ANDROID="$(dirname "$(readlink -e "$0")")"
-ROOT_FOLDER="$CONTRIB_ANDROID"/../..
-PACKAGES="$ROOT_FOLDER"/packages/
-LOCALE="$ROOT_FOLDER"/electrum/locale/
+CONTRIB="$CONTRIB_ANDROID"/..
+PROJECT_ROOT="$CONTRIB"/..
+PACKAGES="$PROJECT_ROOT"/packages/
+LOCALE="$PROJECT_ROOT"/electrum/locale/
 
-if [ ! -d "$LOCALE" ]; then
-  echo "Run pull_locale first!"
-  exit 1
-fi
+. "$CONTRIB"/build_tools_util.sh
 
 if [ ! -d "$PACKAGES" ]; then
-  echo "Run make_packages first!"
-  exit 1
+  "$CONTRIB"/make_packages || fail "make_packages failed"
 fi
 
-pushd ./contrib/android
+pushd "$PROJECT_ROOT"
+git submodule update --init
+popd
 
-make theming
+# update locale
+info "preparing electrum-locale."
+(
+    cd "$CONTRIB"/deterministic-build/electrum-locale
+    if ! which msgfmt > /dev/null 2>&1; then
+        fail "Please install gettext"
+    fi
+    # we want the binary to have only compiled (.mo) locale files; not source (.po) files
+    rm -rf "$PROJECT_ROOT/electrum/locale/"
+    for i in ./locale/*; do
+        dir="$PROJECT_ROOT/electrum/$i/LC_MESSAGES"
+        mkdir -p $dir
+        msgfmt --output-file="$dir/electrum.mo" "$i/electrum.po" || true
+    done
+)
 
+pushd "$CONTRIB_ANDROID"
+
+info "apk building phase starts."
 if [[ -n "$1"  && "$1" == "release" ]] ; then
+    # do release build, and sign the APKs.
     echo -n Keystore Password:
     read -s password
     export P4A_RELEASE_KEYSTORE=~/.keystore
@@ -33,7 +50,15 @@ if [[ -n "$1"  && "$1" == "release" ]] ; then
     make release
     export APP_ANDROID_ARCH=arm64-v8a
     make release
+elif [[ -n "$1"  && "$1" == "release-unsigned" ]] ; then
+    # do release build, but do not sign the APKs.
+    # build two apks
+    export APP_ANDROID_ARCH=armeabi-v7a
+    make release
+    export APP_ANDROID_ARCH=arm64-v8a
+    make release
 else
+    # do debug build; the default.
     export P4A_DEBUG_KEYSTORE="$CONTRIB_ANDROID"/android_debug.keystore
     export P4A_DEBUG_KEYSTORE_PASSWD=unsafepassword
     export P4A_DEBUG_KEYALIAS_PASSWD=unsafepassword
diff --git a/contrib/build-linux/sdist/make_tgz b/contrib/build-linux/sdist/make_tgz
index 81b672f91..b61bbbbbc 100755
--- a/contrib/build-linux/sdist/make_tgz
+++ b/contrib/build-linux/sdist/make_tgz
@@ -36,9 +36,6 @@ git submodule update --init
 (
     cd "$ROOT_FOLDER"
 
-    # we could build the kivy atlas potentially?
-    #(cd contrib/android/; make theming) || echo "building kivy atlas failed! skipping."
-
     find -exec touch -h -d '2000-11-11T11:11:11+00:00' {} +
 
     # note: .zip sdists would not be reproducible due to https://bugs.python.org/issue40963
diff --git a/contrib/deterministic-build/requirements-build-android.txt b/contrib/deterministic-build/requirements-build-android.txt
new file mode 100644
index 000000000..a2f742f1e
--- /dev/null
+++ b/contrib/deterministic-build/requirements-build-android.txt
@@ -0,0 +1,153 @@
+appdirs==1.4.4 \
+    --hash=sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41 \
+    --hash=sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128
+colorama==0.4.4 \
+    --hash=sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b \
+    --hash=sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2
+Cython==0.29.23 \
+    --hash=sha256:0c4b9f7e3aa004cf3f364e3e772f55fec5740485bafea99d1f13bdc9bbd8a545 \
+    --hash=sha256:20402ef316393168909926ab21848aa6e08e39bed5003b657139774e66166cd0 \
+    --hash=sha256:20cb50d9fede8029bdb50875458f07a27f909289aeed4cdb9c19544dd9a9bc45 \
+    --hash=sha256:2365f3b5e6451b6bc6dcd262230656f4ade1d862ec2f6c22154deebef37c08b6 \
+    --hash=sha256:266459c7e48fe3c6c492b297e4033e42d4c6863cc1a1ff7cc4034949fc574fa6 \
+    --hash=sha256:282263628c5d601b313d5920f7b6d7e08c7fedbddacd080c4858aa04d86b6b4b \
+    --hash=sha256:2a3bbce689a2fddb85aa66712d93875c99bf7f64ac82b1d149ecce522a7a4e0c \
+    --hash=sha256:2af52d312e96b38ded38b34d06e22685c226b1b0e58278bd27209f5d2385d115 \
+    --hash=sha256:355a6e768d91e21fbf477b61881bab64b7a2da386a166898997bccefd532cf5d \
+    --hash=sha256:37ff66039e3d138ec968ee1d1e12441fa5fb4e6a9c5458bc3c3a232f01be4a7d \
+    --hash=sha256:3b29224eb62309a10819d923dc6262f769e4f3facfee3cd06372c355e5b38b33 \
+    --hash=sha256:3ef530f975e3a760e7282fce2a25f900fa63f96d17321b4aa5f5542eb9859cdf \
+    --hash=sha256:41cd0dd2ff5d78466e73409db509887a84449b400074d4f217980cedbb18e4be \
+    --hash=sha256:474c1a29ab43e29d990df279e2cf6aa96baa9208f5cd4bc76ac87ffcdf1e2945 \
+    --hash=sha256:4858043ac5f96a8f0277cf63760bb39b9521c1f897678cf1d22423f3e758f4ed \
+    --hash=sha256:4b0bcf2e06a9063fc78c3243ed4003228375d532ef13b9e5d7183be8f0a52cf5 \
+    --hash=sha256:4b6824b58d4373224fc76ee8bee6b35c2d17c91a1ed0fa67b88440f63daebe50 \
+    --hash=sha256:4d7c3b0882d8757c601eaf288fc0d321d5c7ac6c3afb8c42eddf9325a3419cf5 \
+    --hash=sha256:519fccf526d26b377e1db22f22aa44889b28bc5833ec106588cb13557e8ba2da \
+    --hash=sha256:58dc06871bfdb0592542d779714fe9f918e11ba20ac07757dd63b198bdc704fe \
+    --hash=sha256:5a6792153b728a0240e55bbb5b643f4f7e45c76319e03abf15bf367471ea1d1a \
+    --hash=sha256:5be3ae3189cf7d0e9bbeafb854496dc7030c6f6a5602d809435fab8223543a41 \
+    --hash=sha256:625a16103770fd92b487b701fb0c07e5790b080f40fa11ce572a2d56d9e9fcca \
+    --hash=sha256:6a0d31452f0245daacb14c979c77e093eb1a546c760816b5eed0047686baad8e \
+    --hash=sha256:794e3df0b57e16bce7583ac909126f4cb381fe566adadb20484d89095855eedb \
+    --hash=sha256:7b7a766726d207d7cd57aff0fcb4b35ce042d3cc88a421fcdb45eeb61a5b9d12 \
+    --hash=sha256:7d6a33c8a11f05f698e215bfdb837f32c27f63c20f3af863557ed91c748dc2be \
+    --hash=sha256:a8eed9c82e8fe07b8a8ffbd36018871a17458903fc25c9d015f37b54513a3efd \
+    --hash=sha256:aa3bb0928fb2aa3a8828801eb8b29af2261c199f805ae835467489e2bdd00372 \
+    --hash=sha256:b0699f0dc90181f2458fdb8170455e7798a309e18f41379eda7a2dc8c7aadee0 \
+    --hash=sha256:c4b82461edbbcf90f19b319006345b77474a2d7514e1476d49a14bbd55d6b797 \
+    --hash=sha256:ceccc03b633113ede1f14ad914a6db5c278ce108c8ddb308a5c01c1567d8a02a \
+    --hash=sha256:ef21c51350462160456eb71df31b0869e5141e940f22c61c358bdb6e3ebc3388 \
+    --hash=sha256:f4aca6bffb1c1c3c4ada3347d0b162a699c18a66e097ee08b63b3a35118fdfcc \
+    --hash=sha256:ff885f18d169759b57f116d3956e45cd2b9cba989fde348bba091544c668dc11
+distlib==0.3.1 \
+    --hash=sha256:8c09de2c67b3e7deef7184574fc060ab8a793e7adbb183d942c389c8b13c52fb \
+    --hash=sha256:edf6116872c863e1aa9d5bb7cb5e05a022c519a4594dc703843343a9ddd9bff1
+filelock==3.0.12 \
+    --hash=sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59 \
+    --hash=sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836
+importlib-metadata==4.0.1 \
+    --hash=sha256:8c501196e49fb9df5df43833bdb1e4328f64847763ec8a50703148b73784d581 \
+    --hash=sha256:d7eb1dea6d6a6086f8be21784cc9e3bcfa55872b52309bc5fad53a8ea444465d
+importlib-resources==5.1.2 \
+    --hash=sha256:642586fc4740bd1cad7690f836b3321309402b20b332529f25617ff18e8e1370 \
+    --hash=sha256:ebab3efe74d83b04d6bf5cd9a17f0c5c93e60fb60f30c90f56265fce4682a469
+Jinja2==2.11.3 \
+    --hash=sha256:03e47ad063331dd6a3f04a43eddca8a966a26ba0c5b7207a9a9e4e08f1b29419 \
+    --hash=sha256:a6d58433de0ae800347cab1fa3043cebbabe8baa9d29e668f1c768cb87a333c6
+MarkupSafe==1.1.1 \
+    --hash=sha256:00bc623926325b26bb9605ae9eae8a215691f33cae5df11ca5424f06f2d1f473 \
+    --hash=sha256:09027a7803a62ca78792ad89403b1b7a73a01c8cb65909cd876f7fcebd79b161 \
+    --hash=sha256:09c4b7f37d6c648cb13f9230d847adf22f8171b1ccc4d5682398e77f40309235 \
+    --hash=sha256:1027c282dad077d0bae18be6794e6b6b8c91d58ed8a8d89a89d59693b9131db5 \
+    --hash=sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42 \
+    --hash=sha256:195d7d2c4fbb0ee8139a6cf67194f3973a6b3042d742ebe0a9ed36d8b6f0c07f \
+    --hash=sha256:22c178a091fc6630d0d045bdb5992d2dfe14e3259760e713c490da5323866c39 \
+    --hash=sha256:24982cc2533820871eba85ba648cd53d8623687ff11cbb805be4ff7b4c971aff \
+    --hash=sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b \
+    --hash=sha256:2beec1e0de6924ea551859edb9e7679da6e4870d32cb766240ce17e0a0ba2014 \
+    --hash=sha256:3b8a6499709d29c2e2399569d96719a1b21dcd94410a586a18526b143ec8470f \
+    --hash=sha256:43a55c2930bbc139570ac2452adf3d70cdbb3cfe5912c71cdce1c2c6bbd9c5d1 \
+    --hash=sha256:46c99d2de99945ec5cb54f23c8cd5689f6d7177305ebff350a58ce5f8de1669e \
+    --hash=sha256:500d4957e52ddc3351cabf489e79c91c17f6e0899158447047588650b5e69183 \
+    --hash=sha256:535f6fc4d397c1563d08b88e485c3496cf5784e927af890fb3c3aac7f933ec66 \
+    --hash=sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b \
+    --hash=sha256:62fe6c95e3ec8a7fad637b7f3d372c15ec1caa01ab47926cfdf7a75b40e0eac1 \
+    --hash=sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15 \
+    --hash=sha256:6dd73240d2af64df90aa7c4e7481e23825ea70af4b4922f8ede5b9e35f78a3b1 \
+    --hash=sha256:6f1e273a344928347c1290119b493a1f0303c52f5a5eae5f16d74f48c15d4a85 \
+    --hash=sha256:6fffc775d90dcc9aed1b89219549b329a9250d918fd0b8fa8d93d154918422e1 \
+    --hash=sha256:717ba8fe3ae9cc0006d7c451f0bb265ee07739daf76355d06366154ee68d221e \
+    --hash=sha256:79855e1c5b8da654cf486b830bd42c06e8780cea587384cf6545b7d9ac013a0b \
+    --hash=sha256:7c1699dfe0cf8ff607dbdcc1e9b9af1755371f92a68f706051cc8c37d447c905 \
+    --hash=sha256:7fed13866cf14bba33e7176717346713881f56d9d2bcebab207f7a036f41b850 \
+    --hash=sha256:84dee80c15f1b560d55bcfe6d47b27d070b4681c699c572af2e3c7cc90a3b8e0 \
+    --hash=sha256:88e5fcfb52ee7b911e8bb6d6aa2fd21fbecc674eadd44118a9cc3863f938e735 \
+    --hash=sha256:8defac2f2ccd6805ebf65f5eeb132adcf2ab57aa11fdf4c0dd5169a004710e7d \
+    --hash=sha256:98bae9582248d6cf62321dcb52aaf5d9adf0bad3b40582925ef7c7f0ed85fceb \
+    --hash=sha256:98c7086708b163d425c67c7a91bad6e466bb99d797aa64f965e9d25c12111a5e \
+    --hash=sha256:9add70b36c5666a2ed02b43b335fe19002ee5235efd4b8a89bfcf9005bebac0d \
+    --hash=sha256:9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c \
+    --hash=sha256:a6a744282b7718a2a62d2ed9d993cad6f5f585605ad352c11de459f4108df0a1 \
+    --hash=sha256:acf08ac40292838b3cbbb06cfe9b2cb9ec78fce8baca31ddb87aaac2e2dc3bc2 \
+    --hash=sha256:ade5e387d2ad0d7ebf59146cc00c8044acbd863725f887353a10df825fc8ae21 \
+    --hash=sha256:b00c1de48212e4cc9603895652c5c410df699856a2853135b3967591e4beebc2 \
+    --hash=sha256:b1282f8c00509d99fef04d8ba936b156d419be841854fe901d8ae224c59f0be5 \
+    --hash=sha256:b1dba4527182c95a0db8b6060cc98ac49b9e2f5e64320e2b56e47cb2831978c7 \
+    --hash=sha256:b2051432115498d3562c084a49bba65d97cf251f5a331c64a12ee7e04dacc51b \
+    --hash=sha256:b7d644ddb4dbd407d31ffb699f1d140bc35478da613b441c582aeb7c43838dd8 \
+    --hash=sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6 \
+    --hash=sha256:bf5aa3cbcfdf57fa2ee9cd1822c862ef23037f5c832ad09cfea57fa846dec193 \
+    --hash=sha256:c8716a48d94b06bb3b2524c2b77e055fb313aeb4ea620c8dd03a105574ba704f \
+    --hash=sha256:caabedc8323f1e93231b52fc32bdcde6db817623d33e100708d9a68e1f53b26b \
+    --hash=sha256:cd5df75523866410809ca100dc9681e301e3c27567cf498077e8551b6d20e42f \
+    --hash=sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2 \
+    --hash=sha256:d53bc011414228441014aa71dbec320c66468c1030aae3a6e29778a3382d96e5 \
+    --hash=sha256:d73a845f227b0bfe8a7455ee623525ee656a9e2e749e4742706d80a6065d5e2c \
+    --hash=sha256:d9be0ba6c527163cbed5e0857c451fcd092ce83947944d6c14bc95441203f032 \
+    --hash=sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7 \
+    --hash=sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be \
+    --hash=sha256:feb7b34d6325451ef96bc0e36e1a6c0c1c64bc1fbec4b854f4529e51887b1621
+pep517==0.6.0 \
+    --hash=sha256:273345f4538306f6e4056d8bbced566e186ab4defc188cb3be3e413b5d255912 \
+    --hash=sha256:dde535e9a42de94f4cd941dbaa6feb0a4b5143ffd3906efea091c3826cb7d33d
+pexpect==4.8.0 \
+    --hash=sha256:0b48a55dcb3c05f3329815901ea4fc1537514d6ba867a152b581d69ae3710937 \
+    --hash=sha256:fc65a43959d153d0114afe13997d439c22823a27cefceb5ff35c2178c6784c0c
+pip==21.1 \
+    --hash=sha256:a810bf07c3723a28621c29abe8e34429fa082c337f89aea9a795865416b66d3e \
+    --hash=sha256:ea9f2668484893e90149fd5a6124e04651ffedd67203a8aaf030d31406b937a4
+ptyprocess==0.7.0 \
+    --hash=sha256:4b41f3967fce3af57cc7e94b888626c18bf37a083e3651ca8feeb66d492fef35 \
+    --hash=sha256:5c5d0a3b48ceee0b48485e0c26037c0acd7d29765ca3fbb5cb3831d347423220
+pytoml==0.1.21 \
+    --hash=sha256:57a21e6347049f73bfb62011ff34cd72774c031b9828cb628a752225136dfc33 \
+    --hash=sha256:8eecf7c8d0adcff3b375b09fe403407aa9b645c499e5ab8cac670ac4a35f61e7
+setuptools==56.0.0 \
+    --hash=sha256:08a1c0f99455307c48690f00d5c2ac2c1ccfab04df00454fef854ec145b81302 \
+    --hash=sha256:7430499900e443375ba9449a9cc5d78506b801e929fef4a186496012f93683b5
+sh==1.14.1 \
+    --hash=sha256:39aa9af22f6558a0c5d132881cf43e34828ca03e4ae11114852ca6a55c7c1d8e \
+    --hash=sha256:75e86a836f47de095d4531718fe8489e6f7446c75ddfa5596f632727b919ffae
+six==1.15.0 \
+    --hash=sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259 \
+    --hash=sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced
+toml==0.10.2 \
+    --hash=sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b \
+    --hash=sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f
+typing-extensions==3.7.4.3 \
+    --hash=sha256:7cb407020f00f7bfc3cb3e7881628838e69d8f3fcab2f64742a5e76b2f841918 \
+    --hash=sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c \
+    --hash=sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f
+virtualenv==20.4.4 \
+    --hash=sha256:09c61377ef072f43568207dc8e46ddeac6bcdcaf288d49011bda0e7f4d38c4a2 \
+    --hash=sha256:a935126db63128861987a7d5d30e23e8ec045a73840eeccb467c148514e29535
+wheel==0.36.2 \
+    --hash=sha256:78b5b185f0e5763c26ca1e324373aadd49182ca90e825f7853f4b2509215dc0e \
+    --hash=sha256:e11eefd162658ea59a60a0f6c7d493a7190ea4b9a85e335b33489d9f17e0245e
+zipp==3.4.1 \
+    --hash=sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76 \
+    --hash=sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098
+pathlib2==2.3.5 \
+    --hash=sha256:0ec8205a157c80d7acc301c0b18fbd5d44fe655968f5d947b6ecef5290fc35db \
+    --hash=sha256:6cd9a47b597b37cc57de1c05e56fb1a1c9cc9fab04fe78c29acd090418529868
\ No newline at end of file
diff --git a/contrib/freeze_packages.sh b/contrib/freeze_packages.sh
index 8782056fe..c265345f9 100755
--- a/contrib/freeze_packages.sh
+++ b/contrib/freeze_packages.sh
@@ -20,7 +20,7 @@ which virtualenv > /dev/null 2>&1 || { echo "Please install virtualenv" && exit
 
 ${SYSTEM_PYTHON} -m hashin -h > /dev/null 2>&1 || { ${SYSTEM_PYTHON} -m pip install hashin; }
 
-for i in '' '-hw' '-binaries' '-binaries-mac' '-build-wine' '-build-mac' '-build-sdist' '-build-appimage'; do
+for i in '' '-hw' '-binaries' '-binaries-mac' '-build-wine' '-build-mac' '-build-sdist' '-build-appimage' '-build-android'; do
     rm -rf "$venv_dir"
     virtualenv -p ${SYSTEM_PYTHON} $venv_dir
 
diff --git a/contrib/make_packages b/contrib/make_packages
index 26441447d..6d29044fe 100755
--- a/contrib/make_packages
+++ b/contrib/make_packages
@@ -1,11 +1,39 @@
 #!/bin/bash
+# This script installs our pure python dependencies into the 'packages' folder.
+
+set -e
+
+CONTRIB="$(dirname "$(readlink -e "$0")")"
+PROJECT_ROOT="$CONTRIB"/..
+PACKAGES="$PROJECT_ROOT"/packages/
 
-CONTRIB="$(dirname "$0")"
 test -n "$CONTRIB" -a -d "$CONTRIB" || exit
 
-rm "$CONTRIB"/../packages/ -r
+if [ -d "$PACKAGES" ]; then
+  rm -r "$PACKAGES"
+fi
+
+# opt out of compiling C extensions
+# FIXME aiohttp opt-out is not released yet: https://github.com/aio-libs/aiohttp/pull/3828
+export AIOHTTP_NO_EXTENSIONS=1
+export YARL_NO_EXTENSIONS=1
+export MULTIDICT_NO_EXTENSIONS=1
+
+# if we end up having to compile something, at least give reproducibility a fighting chance
+export LC_ALL=C
+export TZ=UTC
+export SOURCE_DATE_EPOCH="$(git log -1 --pretty=%ct)"
+export PYTHONHASHSEED="$SOURCE_DATE_EPOCH"
+export BUILD_DATE="$(LC_ALL=C TZ=UTC date +'%b %e %Y' -d @$SOURCE_DATE_EPOCH)"
+export BUILD_TIME="$(LC_ALL=C TZ=UTC date +'%H:%M:%S' -d @$SOURCE_DATE_EPOCH)"
 
-#Install pure python modules in electrum directory
-python3 -m pip install --no-dependencies --no-binary :all: \
+# FIXME aiohttp will compile some .so files using distutils
+#       (until https://github.com/aio-libs/aiohttp/pull/4079 gets released),
+#       which are not reproducible unless using at least python 3.9
+#       (as it needs https://github.com/python/cpython/commit/0d30ae1a03102de07758650af9243fd31211325a).
+#       Hence "aiohttp-*.dist-info/" is not reproducible either.
+#       All this means that downstream users of this script, such as the sdist build
+#       and the android apk build need to make sure these files get excluded.
+python3 -m pip install --no-compile --no-dependencies --no-binary :all: \
     -r "$CONTRIB"/deterministic-build/requirements.txt -t "$CONTRIB"/../packages
 
diff --git a/contrib/requirements/requirements-build-android.txt b/contrib/requirements/requirements-build-android.txt
new file mode 100644
index 000000000..2f579ede2
--- /dev/null
+++ b/contrib/requirements/requirements-build-android.txt
@@ -0,0 +1,18 @@
+pip
+setuptools
+wheel
+cython
+
+# needed by buildozer:
+pexpect
+virtualenv
+sh
+
+# needed by python-for-android:
+appdirs
+colorama>=0.3.3
+jinja2
+six
+sh>=1.10
+pep517<0.7.0
+toml
diff --git a/electrum/gui/kivy/theming/atlas b/electrum/gui/kivy/theming/atlas
new file mode 160000
index 000000000..a608a3672
--- /dev/null
+++ b/electrum/gui/kivy/theming/atlas
@@ -0,0 +1 @@
+Subproject commit a608a36722ee5765009322fe6765507e2c6e6efe
diff --git a/electrum/gui/kivy/theming/atlas/.gitkeep b/electrum/gui/kivy/theming/atlas/.gitkeep
deleted file mode 100644
index e69de29bb..000000000