John DataSync2
vv4.11 · 2.5 MB · code 4110
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File information
UpdatedNov 8, 2025
PublishedFeb 18, 2021
Packagecom.johnemulators.dbxsync
Versionvv4.11 (4110)
Size2.5 MB
MD5449cd0f5356dcb65a398a07983828489
Min SDK23
Malware scanTRUSTED
Signature SHA124:CF:B2:22:C4:B8:D6:1B:DA:7E:6D:99:61:0A:5A:43:FA:DD:FF:CA
SignerCN=John, C=jp
Total downloads100,000
This version100,000
DeveloperJohn emulators
Age ratingEveryone
What's new in vv4.11
-Added support for Android 15
Security scan
TRUSTED
- Developer signature verified 2025-11-08
- Signature SHA1 24:CF:B2:22:C4:B8:D6:1B:DA:7E:6D:99:61:0A:5A:43:FA:DD:FF:CA
- File MD5 449cd0f5356dcb65a398a07983828489
How to install John DataSync2 vv4.11 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 2.5 MB of free storage.
- Grab com.johnemulators.dbxsync_4110.apk — hit the Download button above (2.5 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 449cd0f5356dcb65…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.johnemulators.dbxsync_4110.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 CN=John, C=jp. 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 John DataSync2 — tap Open on the install screen, or find the John DataSync2 icon in your app drawer.
Common install errors for John DataSync2
- "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 6.0 Marshmallow 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.