Is Periodical safe?

This application calculates the fertile days according to Knaus-Ogino and can track menstrual symptoms. WARNING: It is not recommended to use this calendar to avoid pregnancy! There are more accurate methods, like measuring the basal body temperature. The data can be backed up on a memory card or "internal" memory, if present. If you have any further questions or want to help me with translations…

Developer: arnowelzel
Category: Calendar & Agenda
First release: 05 Sept 2026
License: Not documented

02 / Package identity

Technical fingerprint

Application IDde.arnowelzel.android.periodical

Latest APK SHA-2562e9f2fb47c7c0d6a7433ce6ac69b94c650e107ecc66264ce3aaef70c22218be1

Signing certificateEF:16:EF:5F:EE:58:B3:F0:96:4F:DD:69:32:70:52:4A:78:55:13:4E:B5:3C:13:D0:20:65:FF:C8:76:DB:AF:01

MIN ANDROID23TARGET36ARCHITECTURE

03 / History

Project timeline

05 Sept 2026

Package observed in source index

Metadata and versions observed from the fdroid repository index.

04 / Version archive

Documented releases

1 TOTAL

VersionReleasedAndroidArchitecture

1.9705 Sept 202623+→

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

de.arnowelzel.android.periodical.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↗