Focusi - Study Timer v4.21.0
APK · 17 MB · version code 2109 · Android 4.4+ · uploaded Apr 30, 2023
- Same certificate as v4.27.3, which matches Google Play Details
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v4.27.3, uploaded Sep 28, 2026 — about 3 years after this one.
- Size: this file is 17 MB; the latest is 35.3 MB (18.4 MB larger).
- Android: this version needs Android 4.4+; the latest needs Android 7.0+. Use this one if your device runs an older Android release.
- The latest version asks for 4 more permissions: Access adservices ad id, Access adservices attribution, Access adservices topics, Internal broadcast protection (app-defined).
- The latest version no longer asks for: Run foreground services, Read shared storage, Use full screen intent.
File information
- Version
- v4.21.0 (2109)
- Uploaded
- Apr 30, 2023
- Size
- 17 MB
- Requires
- Android 4.4+ (API 19)
- CPU support
- ARM 64-bit
- Screen
- Small screens and larger
- MD5
- 6616ac7b529da55d022a829b1c6ce72d
- Signing certificate (SHA-1)
- EA:18:10:98:9D:61:84:02:5D:40:48:A5:BF:6C:1B:3E:8C:A7:9B:4A
- Signed by
- CN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
- File name
- breakingscope-focusstudyapp-2109-64904747-6616ac7b529da55d022a829b1c6ce72d.apk
- Package
- breakingscope.focusstudyapp
- Downloads (all versions)
- 100K+
- Age rating
- PEGI 3 · Everyone
What's new in v4.21.0
- Minor bug fixes and general improvements.
Permissions (17)
This version requests 17 permissions, 3 of them sensitive.
- Display over other apps Sensitive android.permission.SYSTEM_ALERT_WINDOW
- Package usage stats Sensitive android.permission.PACKAGE_USAGE_STATS
- Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
- Advertising ID com.google.android.gms.permission.AD_ID
- Control vibration android.permission.VIBRATE
- Full network access android.permission.INTERNET
- Get tasks android.permission.GET_TASKS
- Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
- In-app purchases (Google Play Billing) com.android.vending.BILLING
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- Run foreground services android.permission.FOREGROUND_SERVICE
- Schedule exact alarms android.permission.SCHEDULE_EXACT_ALARM
- Show notifications android.permission.POST_NOTIFICATIONS
- Use full screen intent android.permission.USE_FULL_SCREEN_INTENT
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate from Google Play App Signing Google keeps the signing key for the developer, so the certificate carries Google's name.
- Same certificate as v4.27.3, which matches Google Play v4.27.3 · v4.26.6 · v4.26.4
Store checks
- Developer signature verified Apr 30, 2023
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (3 other versions compared). AAPKs doesn't scan files itself.
How to install Focusi - Study Timer on Android 4.4+
You'll need about 34 MB of free space.
- Download the APK — tap Download APK above (17 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 breakingscope-focusstudyapp-2109-64904747-6616ac7b529da55d022a829b1c6ce72d.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 6616ac7b529da55d022a829b1c6ce72d. 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 Focusi - Study Timer — 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 4.4+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for 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.