diff --git a/buildozer/aversion b/buildozer/aversion
index 8e0789e56..9bd7c4843 100755
--- a/buildozer/aversion
+++ b/buildozer/aversion
@@ -9,7 +9,7 @@ else
 fi
 
 # current android version mumber.
-version="2.26.0"
+version="3.0.0"
 sversion=$(echo $version  | sed -E "s:(.*)\..*:\1:")
 tuple=$(echo $version | sed -E "s:(.*)\.(.*)\.(.*):(\1, \2, \3):")
 
diff --git a/buildozer/build-instructions.txt b/buildozer/build-instructions.txt
index 207cfbf4f..5167f4d8b 100644
--- a/buildozer/build-instructions.txt
+++ b/buildozer/build-instructions.txt
@@ -15,10 +15,10 @@ Prepare
 
 Move to directory buildozer.
 
-First create and enter a virtualenv and load all
+First create and enter a virtualenv and load the
 required python modules using pip install.
 
-$> virtualenv ENV
+$> virtualenv --system-site-packages ENV
 $> . ENV/bin/activate
 $> pip install -r pipreq.txt
 
diff --git a/buildozer/buildozer.spec b/buildozer/buildozer.spec
index 69f1bd088..43e884a26 100644
--- a/buildozer/buildozer.spec
+++ b/buildozer/buildozer.spec
@@ -103,7 +103,7 @@ android.permissions = WRITE_EXTERNAL_STORAGE, MANAGE_EXTERNAL_STORAGE
 #android.features = android.hardware.usb.host
 
 # (int) Target Android API, should be as high as possible.
-android.api = 32
+android.api = 33
 
 # (int) Minimum API your APK / AAB will support.
 #android.minapi = 21
@@ -315,7 +315,7 @@ android.debug_artifact = apk
 #p4a.branch = master
 
 # (str) python-for-android specific commit to use, defaults to HEAD, must be within p4a.branch
-p4a.commit = v2023.09.16
+p4a.commit = v2024.01.21
 
 # (str) python-for-android git clone directory (if empty, it will be automatically cloned from github)
 #p4a.source_dir =
diff --git a/buildozer/fdroid.init b/buildozer/fdroid.init
index 419997ada..f669899c0 100755
--- a/buildozer/fdroid.init
+++ b/buildozer/fdroid.init
@@ -1,6 +1,17 @@
 #!/bin/bash
 set -eux
 
+if [[ -z ${AAPI+x} ]]
+then
+  exit 1
+fi
+
+virtualenv FINIT
+source FINIT/bin/activate
+
+pip3 install attrs
+pip3 install pysol_cards
+
 tmpdir=..
 
 echo '### prepare source'
@@ -27,7 +38,7 @@ echo '### eval version'
 echo '### prepare buildozer'
 
 sed -r "s:#? ?source\.dir =.*:source.dir = ..:" -i buildozer.spec
-sed -r "s:#? ?source\.exclude_dirs =.*:source.exclude_dirs = Screenshots,android,buildozer,tests,fastlane:" -i buildozer.spec
+sed -r "s:#? ?source\.exclude_dirs =.*:source.exclude_dirs = Screenshots,android,buildozer,contrib,tests,fastlane:" -i buildozer.spec
 sed -r "s:#? ?source\.exclude_patterns =.*:source.exclude_patterns = README.*,AUTHORS.md,CONTRIBUTING.md,COPYING,MANIFEST.in,Makefile,NEWS.asciidoc,appdata.xml,pysol.py,run-tests.pl,setup.cfg,setup.py,setup_osx.py,local.properties,p4a_env_vars.txt:" -i buildozer.spec
 sed -r "s:#? ?android\.skip_update =.*:android.skip_update = True:" -i buildozer.spec
 sed -r "s:#? ?android\.accept_sdk_license =.*:android.accept_sdk_license = False:" -i buildozer.spec
@@ -35,3 +46,6 @@ sed -r "s:#? ?log_level =.*:log_level = 2:" -i buildozer.spec
 
 
 echo '### end init'
+
+deactivate
+rm -rf FINIT
diff --git a/buildozer/helpers/setbuildvars b/buildozer/helpers/setbuildvars
new file mode 100755
index 000000000..3b1254759
--- /dev/null
+++ b/buildozer/helpers/setbuildvars
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+VP4A='v2024.01.21'
+VBUILDOZER='3ebc09e885457db4747e67a1250c2aea1ca7a046'
+VCPYTHON='v3.11.5'
+VCYTHON='3.0.10'
+AAPI=$(cat buildozer.spec | grep -e "^android[.]api" | sed -E "s/^.*([0-9].).*/\1/")
+export AAPI
diff --git a/buildozer/minimal.txt b/buildozer/minimal.txt
index 9adc38b0d..523423a49 100644
--- a/buildozer/minimal.txt
+++ b/buildozer/minimal.txt
@@ -32,4 +32,4 @@ cardset-tuxedo
 cardset-uni-mahjongg
 cardset-victoria-falls-5x5
 cardset-vienna-2k
-cardset-z_minimal
+cardset-z-minimal
diff --git a/buildozer/mkcards b/buildozer/mkcards
index 892b9db46..ed7527442 100755
--- a/buildozer/mkcards
+++ b/buildozer/mkcards
@@ -16,7 +16,7 @@ if [ 1 ]; then
 		pushd repo
 		git init
 		git remote add -t master origin https://github.com/shlomif/PySolFC-Cardsets.git
-		git fetch --depth 1 origin 9b63a583dc3e770fa9bf8f2378c37a064aa4969c
+		git fetch --depth 1 origin 3.0
 		git checkout -q FETCH_HEAD
 		popd
 
diff --git a/buildozer/pipreq.txt b/buildozer/pipreq.txt
index 2a403064b..5d490dffa 100644
--- a/buildozer/pipreq.txt
+++ b/buildozer/pipreq.txt
@@ -1,16 +1,12 @@
-appdirs==1.4.4
-attrs==22.2.0
+attrs==23.2.0
+build==1.2.1
 -e git+https://github.com/kivy/buildozer.git@3ebc09e885457db4747e67a1250c2aea1ca7a046#egg=buildozer
+certifi==2024.2.2
 colorama==0.4.6
 configobj==5.0.8
-Cython==0.29.33
-Jinja2==3.1.2
-Kivy==2.2.1
-pep517==0.13.0
-pep8==1.7.1
-permutation==0.4.0
-pip==23.0.1
-pysol-cards==0.14.3
-setuptools==67.0.0
+Kivy==2.3.0
+pip==24.0
+pysol_cards==0.16.0
+setuptools==69.1.1
 toml==0.10.2
-wheel==0.38.4
+wheel==0.42.0
diff --git a/fastlane/metadata/android/en-US/changelogs/102130000.txt b/fastlane/metadata/android/en-US/changelogs/102130000.txt
index d9beae935..a81a4831a 100644
--- a/fastlane/metadata/android/en-US/changelogs/102130000.txt
+++ b/fastlane/metadata/android/en-US/changelogs/102130000.txt
@@ -7,8 +7,9 @@ Android specific:
 - Background images from the save-aspect folder now are preserving correct aspect ratio (bug fix).
 - Mahjongg tile overlapping (3d simulation) is now implemented.
 - Animation of card moves reworked. This fixes some stacking order corruptions reported earlier.
+- Animation of card flip bound to animation settings.
 - Display of html-text (game rules, licence etc): Black windows fixed.
 - Upstream libraries updated to kivy v2.2.1 and python v3.10
 Main version:
 - many new games.
-- consult NEWS.asscidoc or html-src/news.html on the github repo for more change informations.
+- consult NEWS.asscidoc or html-src/news.html on the github repo and https://pysolfc.sourceforge.io for more informations.
diff --git a/fastlane/metadata/android/en-US/full_description.txt b/fastlane/metadata/android/en-US/full_description.txt
index b721ba2e2..b377e013d 100644
--- a/fastlane/metadata/android/en-US/full_description.txt
+++ b/fastlane/metadata/android/en-US/full_description.txt
@@ -6,6 +6,6 @@ Memory and others and is published on
 <a href="https://pysolfc.sourceforge.io/">https://pysolfc.sourceforge.io</a>.
 If you are looking for a desktop version, take a look.
 
-The Android app is based on this work and provides a selection of the desktop
+The Android app is based on this work and provides a subset of the desktop
 functions. It is created and published from selected snapshots out of
 the sources.
diff --git a/pysollib/kivy/card.py b/pysollib/kivy/card.py
index 656d5d1e3..50a4e57c9 100644
--- a/pysollib/kivy/card.py
+++ b/pysollib/kivy/card.py
@@ -90,6 +90,7 @@ def __init__(self, id, deck, suit, rank, game, x=0, y=0):
         self.item = MfxCanvasImage(
             game.canvas, self.x, self.y, image=aimage, anchor="nw")
 
+        self.app = game.app
         # print ('card: face = %s xy=%s/%s' % (self._face_image.source, x, y))
         # print ('card: back = %s xy=%s/%s' % (self._back_image.source, x, y))
         # y = self.yy
@@ -97,11 +98,15 @@ def __init__(self, id, deck, suit, rank, game, x=0, y=0):
     def _setImage(self, image):
         if self.twoImage:
             from kivy.animation import Animation
+            base = float(self.app.opt.animations)
+            dura = base*base/30.0
+            if base > 0: dura += 0.2  # noqa
             z = 0
-            t = 'in_quad'
+            t = 'out_quad'
             if image == self._face_image:
                 z = 1
-            anim = Animation(opacity=z, t=t, d=0.35)
+                t = 'in_quad'
+            anim = Animation(opacity=z, t=t, d=dura)
             anim.start(self._face_image)
         else:
             self._active_image.clear_widgets()