F-Droid Search: offline

Knitting and crochet app: patterns, stash, counters. Offline and free.Apache-2.0

Private, offline phone & contacts app that helps you keep up your bondsGPL-3.0-only

Read your CGM sensor over Bluetooth. Offline, no accounts, no tracking.GPL-3.0-or-later

Offline notes with location-based reminders, folders, and timelineGPL-3.0-or-later

Plan your week by effort, log sets fast, track every PR. Free, offline, no ads.GPL-3.0-or-later

Offline audiobooks from your folders, with saved progress and large controlsMIT

Private period & cycle tracker. Offline, encrypted, no account, no ads.GPL-3.0-only

Play human-like chess offline and review your games with Maia and StockfishAGPL-3.0-only

Hearing training for word recognition: listen, identify, repeat. Fully offline.Apache-2.0

Change the key of any song, keep the tempo. Tuner, loops, speed. Offline.GPL-3.0-only

Turn daily photos into a progress montage. Private, offline, automatic.GPL-3.0-only

Simple, fully offline time-tracking appGPL-3.0-only

Offline Sudoku with logical hints, advanced notes and flexible import/exportGPL-3.0-or-later

Offline OCR for Android. Search your photos by text, entirely on-device.MIT

GPS tracks with live OBD-II metrics; offline queue to your own serverMIT

Offline-first Android reader for Marxist articles, publications, and e-books.GPL-3.0-only

Offline Shogi with an AlphaZero-style AI and eight opponents.GPL-3.0-or-later

The complete GNU Backgammon engine: play, coach, rollouts, career. Offline.GPL-3.0-or-later

Encrypted, offline photo & video vault with a comfortable galleryGPL-3.0-only

Block unwanted notifications. Fast, private, and fully offline.MIT