Name: Ruler (Privacy Friendly)
Availability: InStock
Author: SECUSO - Security Usability Society

01 / Overview

Is Ruler (Privacy Friendly) safe?

Privacy Friendly Ruler can display a ruler or protractor at the edge of the display. This enables on the fly measurements with the smartphone. It belongs to the Privacy Friendly Apps group developed by the research group SECUSO at Karlsruhe Institute of Technology. More information can be found an secuso.org/pfa/ What makes Privacy Friendly Ruler different from other similar apps? 1. No permissio…

Developer: SECUSO - Security Usability Society
Category: Multimedia
First release: 21 Jul 2025
License: Not documented

02 / Package identity

Technical fingerprint

Application IDorg.secuso.privacyfriendlyruler

Latest APK SHA-256aa4f1096a4131fd7673f9fea8897598c34b935703a78b1b753c3a104579ea351

Signing certificate3A:FF:CD:F2:AF:47:E2:47:3A:3A:9E:C5:0B:AC:8E:2B:B4:5D:26:D9:03:E7:0A:D7:DC:7E:36:0B:94:2A:38:42

MIN ANDROID17TARGET34ARCHITECTURE

03 / History

Project timeline

21 Jul 2025

Package observed in source index

Metadata and versions observed from the fdroid repository index.

04 / Version archive

Documented releases

1 TOTAL

VersionReleasedAndroidArchitecture

1.1.421 Jul 202517+→

05 / Safety & access

Safety verdict

Authentic — file hash matches the source indexNo ads or tracking flagged by the source

IntegritySHA-256 verified vs source

SourceOpen-source · fdroid

Permissions1 declared · 0 sensitive

Signaturepresent

Anti-featuresNo known anti-features

Sensitive accessNo sensitive permissions

Declared permissions

org.secuso.privacyfriendlyruler.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Tracker status: Not assessed by WIKI for Android.

06 / Sources

Evidence ledger

Each entry is a captured public reference backing this record.

RepositorySource package page↗Source codeSource repository↗