About Sincerus

Sincerus is a text social network for iPhone. People write short posts in their own words, follow each other and talk in end-to-end encrypted chats. Every post is typed in an editor where paste and AI writing are off and confirmed on the iPhone before it goes live, so Sincerus has no bots and no AI-written posts.

Feeds are filling with posts no person wrote: bots, spam and, more and more, text generated by AI. It is getting hard to know who, or what, you are talking to. Sincerus starts from one rule that settles the question for every post: a person typed it, on their own iPhone.

Sincerus is made by Mehmet Ata Kartal, an independent developer who designs, builds and runs it. There are no investors deciding what the feed should be optimised for. You can reach him at hello@sincerus.app.

From Premium, an optional subscription ($4.99 a month or $39.99 a year) with a badge, longer posts and a few extras. The free tier shows clearly marked ads; Premium removes them and never ranks anyone higher. See Premium.

1. Words have a person behind them

   Every post is typed and confirmed by its author.

2. Your feed is yours

   Following opens first, in time order. Ranking is a choice, not the default.

3. Private means private

   Chats are end-to-end encrypted and Face ID never leaves your iPhone.

4. AI helps you read, never writes

   Translation and summaries run on your device; no post is written for you.

On iPhone, in English and Turkish: for people 18 and older in the United States and Türkiye, with an e-Devlet age check in Türkiye. Sincerus is coming soon to the App Store; in Türkiye, sign-ups open once e-Devlet age verification is ready.