On-screen Ruler (Pro)
v1.22 · 409.2 KB · code 22
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File information
UpdatedOct 29, 2024
PublishedSep 14, 2020
Packagecom.needjava.screenruler
Versionv1.22 (22)
Size409.2 KB
MD523047dd9abd33a32b9517209dd8cb538
Min SDK16
Malware scanTRUSTED
Signature SHA15B:28:EA:E6:1D:B8:E9:53:7B:63:83:75:28:EA:6C:9B:6E:DC:18:03
SignerCN=NeedJava, OU=NeedJava, O=NeedJava, L=cn, ST=cn, C=cn
Total downloads100
This version100
DeveloperNeedJava
Age ratingEveryone
What's new in v1.22
06/04/2020
Fix regression bug
05/30/2020
Lock ruler
08/29/2019
Fix NPE
08/23/2019
Enhancement
08/17/2019
Fix Android 9.0
06/28/2019
Support Android 9.0
02/01/2018
Support Android 8.1
02/17/2017
Enhancement
09/29/2016
Save status
09/24/2016
German, thanks Vartan.
03/23/2016
New UI
11/15/2015
More languages
03/28/2015
New icon
03/15/2015
UI improvement, for Pi day π
03/06/2015
UI bug fix
Fix regression bug
05/30/2020
Lock ruler
08/29/2019
Fix NPE
08/23/2019
Enhancement
08/17/2019
Fix Android 9.0
06/28/2019
Support Android 9.0
02/01/2018
Support Android 8.1
02/17/2017
Enhancement
09/29/2016
Save status
09/24/2016
German, thanks Vartan.
03/23/2016
New UI
11/15/2015
More languages
03/28/2015
New icon
03/15/2015
UI improvement, for Pi day π
03/06/2015
UI bug fix
Security scan
TRUSTED
- Developer signature verified 2021-04-21
- Scanned for malware 2021-04-21 12:42:17
- Signature SHA1 5B:28:EA:E6:1D:B8:E9:53:7B:63:83:75:28:EA:6C:9B:6E:DC:18:03
- File MD5 23047dd9abd33a32b9517209dd8cb538
How to install On-screen Ruler (Pro) v1.22 on Android API 16+
Takes about 2 minutes. You'll need roughly 409.2 KB of free storage.
- Grab com.needjava.screenruler_22.apk — hit the Download button above (409.2 KB). 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 23047dd9abd33a32…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.needjava.screenruler_22.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=NeedJava, OU=NeedJava, O=NeedJava, L=cn, ST=cn, C=cn. 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 On-screen Ruler (Pro) — tap Open on the install screen, or find the On-screen Ruler (Pro) icon in your app drawer.
Common install errors for On-screen Ruler (Pro)
- "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 API 16 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.