Oversec

Privacy for All Apps! Encrypt and Disguise Messages in All Your Apps!GPL-3.0-or-later

phyphox

Perform physics experiments with your phone. (by the RWTH Aachen University)GPL-3.0-only

My Expenses

Easy to use personal finance manager: rich functionality and Open SourceGPL-3.0-only

Catima — Loyalty Card Wallet

For your barcodes, memberships, loyalty programs, coupons and tickets.GPL-3.0-or-later

PixelKnot: Hidden Messages

Have a secret that you want to share? Why not hide it in a picture?GPL-3.0-only

Scrambled Exif

Remove the metadata from your pictures before sharing themGPL-3.0-only

Jami

Audio & Video Calls / Chat Take Control of your Communication!GPL-3.0-or-later

Simple File Manager Pro

Handy file explorer for easily searching or organizing your files and foldersGPL-3.0-only