Concentration Tool
v1.0.5 · 7.8 MB · code 13
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File information
UpdatedAug 30, 2025
PublishedAug 30, 2025
Packagecom.prashantsj.apps.concentrationtool
Versionv1.0.5 (13)
Size7.8 MB
MD5a02e808ec672bebd44ac22d6c68f0c93
Min SDK24
Malware scanTRUSTED
Signature SHA132:8B:14:F5:8A:5C:4C:98:E8:59:EE:06:10:9D:4B:1C:88:B0:41:FA
SignerCN=Prashant Jadhav, O=Gustar, L=Pune, ST=Maharashtra, C=411047
Total downloads10,000
This version10,000
Developergustar-droid
Age ratingEveryone
What's new in v1.0.5
Minor changes.
Security scan
TRUSTED
- Developer signature verified 2025-08-30
- Signature SHA1 32:8B:14:F5:8A:5C:4C:98:E8:59:EE:06:10:9D:4B:1C:88:B0:41:FA
- File MD5 a02e808ec672bebd44ac22d6c68f0c93
How to install Concentration Tool v1.0.5 on Android 7.0 Nougat+
Takes about 2 minutes. You'll need roughly 7.8 MB of free storage.
- Grab com.prashantsj.apps.concentrationtool_13.apk — hit the Download button above (7.8 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 a02e808ec672bebd…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.prashantsj.apps.concentrationtool_13.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=Prashant Jadhav, O=Gustar, L=Pune, ST=Maharashtra, C=411047. 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 Concentration Tool — tap Open on the install screen, or find the Concentration Tool icon in your app drawer.
Common install errors for Concentration Tool
- "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 7.0 Nougat 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.