Periodical
Menstruationskalender mit Berechnung der fruchtbaren Tage nach Knaus-Ogino.GPL-3.0-or-later
Trail Sense
Use your phone's sensors to assist with wilderness treksMIT
NoNonsense Notes
A simple notepad and to-do app with an excellent navigationGPL-3.0-or-later
Al-Azan - Prayer Times
Privacy focused open-source muslim Adhan (islamic prayer times) and qibla appAGPL-3.0-only
ylih - your life in headphones
Track how many hours each pair of headphones lasts. Offline, forever, privateMIT
SMSecure
Privacy-focused SMS app with encrypted conversationsGPL-3.0-only
Mensinator
Einfacher und privater Perioden-Tracker – Keine Anmeldung, lokale SpeicherungMIT
FreeOTP+
Two-factor authenticator (2FA) with one-time password protocols (OTP)Apache-2.0
My Expenses
Easy to use personal finance manager: rich functionality and Open SourceGPL-3.0-only
Libellus Potionis
Privacy-friendly alcohol tracker: limits, BAC estimate, PDF reports.GPL-3.0-or-later