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Chadder - Encrypted messaging app

Vocaroo - Vocaroo is a quick and easy way to share voice messages over the interwebs.

GrapheneOS - GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.

spoonity - Spoonity is a white labelled, POS-integrated loyalty solution for the QSR business.

Earlynote - A time-travelling messaging app