Z21 Updater
v2.0.0 · 27.1 MB · code 213
Verify you're human
Solve this to start the download.
File information
UpdatedNov 18, 2025
PublishedApr 24, 2022
Packagecom.z21.z21fwupdate
Versionv2.0.0 (213)
Size27.1 MB
MD55cc466151063f8d64f4c99ff3d32ea46
Min SDK19
ABIsx86, x86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA16F:72:2F:79:32:5D:19:AC:CF:9C:CA:B9:49:47:A0:FC:1B:40:5F:A8
SignerO=Modelleisenbahn GmbH
Total downloads10,000
This version10,000
DeveloperModelleisenbahn München GmbH
Age ratingEveryone
What's new in v2.0.0
The Z21 Updater app has been completely redesigned in version 2.0
Security scan
TRUSTED
- Developer signature verified 2025-11-18
- Signature SHA1 6F:72:2F:79:32:5D:19:AC:CF:9C:CA:B9:49:47:A0:FC:1B:40:5F:A8
- File MD5 5cc466151063f8d64f4c99ff3d32ea46
How to install Z21 Updater v2.0.0 on Android 4.4 KitKat+
Takes about 2 minutes. You'll need roughly 27.1 MB of free storage.
- Grab com.z21.z21fwupdate_213.apk — hit the Download button above (27.1 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 5cc466151063f8d6…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.z21.z21fwupdate_213.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read O=Modelleisenbahn GmbH. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Z21 Updater — tap Open on the install screen, or find the Z21 Updater icon in your app drawer (this build targets x86/x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for Z21 Updater
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 4.4 KitKat or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.
- Works on one phone but not another — this build ships x86/x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.