Chessis: Chess Analysis v21.5
APK · 14 MB · version code 215 · Android 5.0+ · uploaded Sep 9, 2026
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
File information
- Version
- v21.5 (215)
- Uploaded
- Sep 9, 2026
- Size
- 14 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
- Screen
- Small screens and larger
- MD5
- 9df8fe44505001cf00ae799a4249b499
- Signing certificate (SHA-1)
- 7D:64:F9:C2:53:C7:EF:35:A0:72:0F:6F:8A:80:2B:D4:B9:20:AA:3A
- Signed by
- CN=Jx Clarynx, O=zph-mph, OU=anon.org, L=Caraga, ST=Surigao Del Norte, C=8609
- File name
- com-chessimprovement-chessis-215-76542355-9df8fe44505001cf00ae799a4249b499.apk
- Package
- com.chessimprovement.chessis
- Downloads (all versions)
- 1M+
- Age rating
- PEGI 3 · Everyone
What's new in v21.5
🔧 Fixes in this update
• Bots always play a move that matches their strength, even when the engine is busy.
• A second message no longer disappears when two appear at once.
• The game name and notes you type are kept while the save screen reloads.
• More small fixes and stability improvements.
✨ Recent updates also included:
• Stockfish 19 — the newest engine for analysis and bots
• Opening Explorer — see what strong players play in your position, fully offline
Permissions (17)
This version requests 17 permissions, 3 of them sensitive.
- Bluetooth advertise Sensitive android.permission.BLUETOOTH_ADVERTISE
- Bluetooth connect Sensitive android.permission.BLUETOOTH_CONNECT
- Bluetooth scan Sensitive android.permission.BLUETOOTH_SCAN
- Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
- Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
- Advertising ID com.google.android.gms.permission.AD_ID
- Foreground service data sync android.permission.FOREGROUND_SERVICE_DATA_SYNC
- Full network access android.permission.INTERNET
- Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
- Google Play license check com.android.vending.CHECK_LICENSE
- In-app purchases (Google Play Billing) com.android.vending.BILLING
- Internal broadcast protection (app-defined) com.chessimprovement.chessis.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- Run foreground services android.permission.FOREGROUND_SERVICE
- Show notifications android.permission.POST_NOTIFICATIONS
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate issued to “zph-mph” Not the developer's name (“Chess Improvement Apps”). Names in certificates can't be verified, so this alone proves nothing.
Store checks
- Developer signature under review Sep 9, 2026
- Uploaded by “superpocket” Silver tier · 5,272 followers · uploading since 2016
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures. AAPKs doesn't scan files itself.
How to install Chessis: Chess Analysis on Android 5.0+
You'll need about 28 MB of free space.
- Download the APK — tap Download APK above (14 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-chessimprovement-chessis-215-76542355-9df8fe44505001cf00ae799a4249b499.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be 9df8fe44505001cf00ae799a4249b499. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Chessis: Chess Analysis — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 5.0+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.