Ruler

Length measurement tool

KHTSXR · oops.levelandruler

Not rated yet 100K+ downloads v14.0 5.8 MB Android 4.4+ PEGI 3 · Everyone

Download APK 5.8 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v14.0 (14)
Updated: Jun 2, 2026 (4 months ago)
APK size: 5.8 MB
Requires: Android 4.4+ (API 19)
CPU support: Any (no native code)
Category: Tools (app)
Listed since: Feb 3, 2021 (at least)
Permissions: 9
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Ruler is an app by KHTSXR in the Tools category, listed since at least February 2021. It has no native code, so it runs on any Android processor.

Since version 13.0, the APK grew from 4.9 MB to 5.8 MB. It asks for 9 permissions, none of them sensitive. Compared with version 13.0, it adds 3 new permissions: “Access adservices ad id”, “Access adservices attribution” and “Access adservices topics”. The app can read the advertising ID that ad and analytics services use.

Description

From the listing uploaded by “appupdater”.

This is an virtual ruler that can be adjusted to an actual size It is a mini tapeline app and scale ruler app. You can measure any object with red line using this app. Measure length in millimeters(mm) and inches! Before you use it, please set the real inch or millimeter to your own device. You can calibrate a ruler using calibration button on right side down.

Version history

2 versions are listed, going back to v13.0.

v14.0 LATEST Jun 2, 2026 5.8 MB TRUSTED v13.0 Aug 28, 2023 4.9 MB TRUSTED

All 2 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jun 2, 2026.
Certificate issued to “bbunkaheaven” This is the certificate of the Google Play version.
Same certificate as the other version checked

Store checks and file details

Developer signature not checked yet Jun 2, 2026
Validated against Google Play Jun 2, 2026
Signed byCN=bbunkaheaven, O=bbunkaheaven, L=Seoul, C=ko
Signing certificate (SHA-1)53:8E:CF:D6:13:DA:9D:F6:A8:46:5B:01:A7:4B:1A:56:34:2D:70:E6
File MD5021772a28173e2e2ecfb5f09b2389200
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (9)

Ruler requests 9 permissions, none of them sensitive.

Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
Access adservices topics android.permission.ACCESS_ADSERVICES_TOPICS
Advertising ID com.google.android.gms.permission.AD_ID
Full network access android.permission.INTERNET
Internal broadcast protection (app-defined) oops.levelandruler.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Run foreground services android.permission.FOREGROUND_SERVICE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Landscape screen android.hardware.screen.landscape

Ruler APK: questions and answers

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Ruler APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the other version checked. After downloading, check that the file's MD5 is 021772a28173e2e2ecfb5f09b2389200.