diff --git a/metadata/app.reading.stoic.stoicreading.yml b/metadata/app.reading.stoic.stoicreading.yml
index 0b5872c0ce..986693b332 100644
--- a/metadata/app.reading.stoic.stoicreading.yml
+++ b/metadata/app.reading.stoic.stoicreading.yml
@@ -240,13 +240,6 @@ Builds:
     gradle:
       - yes
 
-  - versionName: 1.7.6
-    versionCode: 62
-    commit: 1.7.6
-    subdir: app
-    gradle:
-      - yes
-
   - versionName: 1.7.7
     versionCode: 63
     commit: 1.7.7
diff --git a/metadata/com.simplemobiletools.calendar.pro.yml b/metadata/com.simplemobiletools.calendar.pro.yml
index 6c00868ef9..99440f6fea 100644
--- a/metadata/com.simplemobiletools.calendar.pro.yml
+++ b/metadata/com.simplemobiletools.calendar.pro.yml
@@ -283,14 +283,6 @@ Builds:
       - yes
     prebuild: sed -i -e '/keystore.*{/,/}/d; /keystore/d' build.gradle
 
-  - versionName: 6.8.5
-    versionCode: 172
-    commit: 6.8.5
-    subdir: app
-    gradle:
-      - yes
-    prebuild: sed -i -e '/keystore.*{/,/}/d; /keystore/d' build.gradle
-
   - versionName: 6.9.0
     versionCode: 173
     commit: 6.9.0
diff --git a/metadata/com.simplemobiletools.clock.yml b/metadata/com.simplemobiletools.clock.yml
index 64ee620bb4..3af3afe33b 100644
--- a/metadata/com.simplemobiletools.clock.yml
+++ b/metadata/com.simplemobiletools.clock.yml
@@ -120,14 +120,6 @@ Builds:
       - yes
     prebuild: sed -i -e '/keystore/d' build.gradle
 
-  - versionName: 5.1.0
-    versionCode: 16
-    commit: 5.1.0
-    subdir: app
-    gradle:
-      - yes
-    prebuild: sed -i -e '/keystore.*{/,/}/d; /keystore/d' build.gradle
-
   - versionName: 5.2.0
     versionCode: 17
     commit: 5.2.0
diff --git a/metadata/com.simplemobiletools.contacts.pro.yml b/metadata/com.simplemobiletools.contacts.pro.yml
index 83ddda8911..d6d9280300 100644
--- a/metadata/com.simplemobiletools.contacts.pro.yml
+++ b/metadata/com.simplemobiletools.contacts.pro.yml
@@ -170,14 +170,6 @@ Builds:
       - yes
     prebuild: sed -i -e '/keystore.*{/,/}/d; /keystore/d' build.gradle
 
-  - versionName: 6.7.1
-    versionCode: 58
-    commit: 6.7.1
-    subdir: app
-    gradle:
-      - yes
-    prebuild: sed -i -e '/keystore.*{/,/}/d; /keystore/d' build.gradle
-
   - versionName: 6.8.0
     versionCode: 59
     commit: 6.8.0
diff --git a/metadata/com.tutpro.baresip.yml b/metadata/com.tutpro.baresip.yml
index 3cedbcb449..ea05de2a91 100644
--- a/metadata/com.tutpro.baresip.yml
+++ b/metadata/com.tutpro.baresip.yml
@@ -1057,23 +1057,6 @@ Builds:
       - popd
     ndk: r20b
 
-  - versionName: 17.1.0
-    versionCode: 111
-    commit: 17.1.0
-    subdir: app
-    gradle:
-      - yes
-    srclibs:
-      - libbaresip-android@11.0
-    build:
-      - pushd $$libbaresip-android$$
-      - sed -i -e 's|/opt/Android/Sdk/ndk-bundle|$$NDK$$|' -e 's|/usr/src/baresip-studio|../../com.tutpro.baresip|'
-        Makefile
-      - make download-sources
-      - make install-all
-      - popd
-    ndk: r21
-
   - versionName: 17.2.0
     versionCode: 112
     commit: 17.2.0
diff --git a/metadata/eu.faircode.email.yml b/metadata/eu.faircode.email.yml
index 2623b04553..cf81987839 100644
--- a/metadata/eu.faircode.email.yml
+++ b/metadata/eu.faircode.email.yml
@@ -2188,16 +2188,6 @@ Builds:
     prebuild: sed -i -e '/keystoreProperties/d' build.gradle
     ndk: r21
 
-  - versionName: '1.1039'
-    versionCode: 1039
-    commit: '1.1039'
-    subdir: app
-    submodules: true
-    gradle:
-      - full
-    prebuild: sed -i -e '/keystoreProperties/d' build.gradle
-    ndk: r21
-
   - versionName: '1.1041'
     versionCode: 1041
     commit: '1.1041'
diff --git a/metadata/eu.faircode.netguard.yml b/metadata/eu.faircode.netguard.yml
index 8688e92e39..1ee052311f 100644
--- a/metadata/eu.faircode.netguard.yml
+++ b/metadata/eu.faircode.netguard.yml
@@ -1193,7 +1193,7 @@ Builds:
     gradle:
       - yes
     prebuild: sed -i -e '/keystore/d' -e '/signingConfigs/d' build.gradle
-    ndk: r19c
+    ndk: r21
 
 AutoUpdateMode: Version %v
 UpdateCheckMode: Tags ^[0-9.]+$
diff --git a/metadata/ga.testapp.testapp.yml b/metadata/ga.testapp.testapp.yml
index 8dce2db5e0..5648b3fcc5 100644
--- a/metadata/ga.testapp.testapp.yml
+++ b/metadata/ga.testapp.testapp.yml
@@ -78,19 +78,6 @@ Builds:
       - $$flutter$$/bin/flutter packages pub get
       - $$flutter$$/bin/flutter build apk
 
-  - versionName: 3.6.1
-    versionCode: 46
-    commit: 3.6.1
-    output: build/app/outputs/apk/release/app-release.apk
-    srclibs:
-      - flutter@v1.12.13+hotfix.7
-    prebuild: echo 'android.applicationVariants.all { variant -> variant.outputs.all
-        { output -> outputFileName = "app-${output.baseName}.apk" } }' >> android/app/build.gradle
-    build:
-      - $$flutter$$/bin/flutter config --no-analytics
-      - $$flutter$$/bin/flutter packages pub get
-      - $$flutter$$/bin/flutter build apk
-
   - versionName: 3.7.0
     versionCode: 47
     commit: 3.7.0