UR Mobile
v5.5 · 92.8 MB · code 55
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File information
UpdatedNov 19, 2025
PublishedApr 7, 2021
Packagecom.blackboard.android.central.rochester
Versionv5.5 (55)
Size92.8 MB
MD55844d1f971d13aa4c5482021bfcd9ab8
Min SDK23
ABIsx86, x86-64, armeabi-v7a, arm64-v8a
Malware scanTRUSTED
Signature SHA1AD:D1:6D:B3:87:9D:46:E4:B8:85:C2:CC:6C:E9:70:4E:80:6B:32:E4
SignerCN=Eric Denman, OU=Blackboard Mobile, O=Blackboard, L=San Francisco, ST=CA, C=US
Total downloads10,000
This version10,000
DeveloperUniversity of Rochester
Age ratingEveryone
What's new in v5.5
Performance improvements.
Security scan
TRUSTED
- Developer signature verified 2025-11-19
- Signature SHA1 AD:D1:6D:B3:87:9D:46:E4:B8:85:C2:CC:6C:E9:70:4E:80:6B:32:E4
- File MD5 5844d1f971d13aa4c5482021bfcd9ab8
How to install UR Mobile v5.5 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 92.8 MB of free storage.
- Grab com.blackboard.android.central.rochester_55.apk — hit the Download button above (92.8 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 5844d1f971d13aa4…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.blackboard.android.central.rochester_55.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=Eric Denman, OU=Blackboard Mobile, O=Blackboard, L=San Francisco, ST=CA, C=US. 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 UR Mobile — tap Open on the install screen, or find the UR Mobile icon in your app drawer (this build targets x86/x86-64/armeabi-v7a/arm64-v8a devices).
Common install errors for UR Mobile
- "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.
- Works on one phone but not another — this build ships x86/x86-64/armeabi-v7a/arm64-v8a native code. Devices with a different CPU will reject it.