IB Physics
v1.4.2 · 8.6 MB · code 20
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File information
UpdatedAug 12, 2020
PublishedAug 12, 2020
Packagecom.proton.dir4.app_ib_ph
Versionv1.4.2 (20)
Size8.6 MB
MD5df316d355ffc3c5127ee1041a6d2cb8c
Min SDK19
Malware scanTRUSTED
Signature SHA161:0A:28:9B:C0:BE:DE:74:86:C0:95:7E:78:72:45:B6:80:AB:BC:24
SignerCN=Chunping Kan, OU=CLES, O=CLES, L=Hong Kong, ST=Hong Kong, C=852
Total downloads500
This version500
DeveloperConcept learning express
Age ratingEveryone
Security scan
TRUSTED
- Developer signature verified 2020-08-12
- Scanned for malware 2020-09-27 04:13:35
- Signature SHA1 61:0A:28:9B:C0:BE:DE:74:86:C0:95:7E:78:72:45:B6:80:AB:BC:24
- File MD5 df316d355ffc3c5127ee1041a6d2cb8c
How to install IB Physics v1.4.2 on Android 4.4 KitKat+
Takes about 2 minutes. You'll need roughly 8.6 MB of free storage.
- Grab com.proton.dir4.app_ib_ph_20.apk — hit the Download button above (8.6 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 df316d355ffc3c51…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.proton.dir4.app_ib_ph_20.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=Chunping Kan, OU=CLES, O=CLES, L=Hong Kong, ST=Hong Kong, C=852. 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 IB Physics — tap Open on the install screen, or find the IB Physics icon in your app drawer.
Common install errors for IB Physics
- "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.