Sincerus questions and answers

Yes. Sincerus is free on iPhone. Premium ($4.99 a month or $39.99 a year) adds a badge, longer posts and a few extras, and never changes how your posts rank.

People with an iPhone on iOS 26 or later: from age 18, in the United States and in Türkiye. You sign up with Sign in with Apple; Sincerus doesn’t ask for an ID document. In Türkiye the law adds an e-Devlet age check, and sign-ups there open once it is ready.

Because Turkish law requires social networks to check age with an e-Devlet age token when an account is created. Sincerus learns only your age group from it, never your name or T.C. identity number, and keeps no copy of the token. Read age verification in Türkiye.

Text, up to 280 characters (1,000 with Premium), with either one link that shows a preview card or up to 2 photos. A post can also be just photos. Post photos you took or made yourself. Images made with AI aren’t allowed; touching up your own photo with AI, like removing something in the background, is fine. You can write chains of up to 10 posts. Video isn’t supported.

Every Sincerus post carries a tone (positive, neutral or negative) and can carry a type (fact, opinion, both, question, humor, story or analysis) and a topic. They tell readers what kind of post they are looking at before they read it.

Following opens first: posts from people you follow, newest on top. For You and Trending are one tap away. Ads are marked “Ad” or “Sponsored”, Premium members see none, and Premium never ranks anyone higher.

No. Premium adds Undo post, a short delay (5 to 30 seconds) during which you can take a post back before it goes out.

Yes. Chats, one-to-one and in groups of up to 32, are end-to-end encrypted and kept on your iPhone; Sincerus only relays encrypted messages. A group’s name, photo and member list are visible to its members and stored by Sincerus so it can deliver them. See security for safety numbers, disappearing messages and Chat Lock.

Yes. Turn on Private account in Settings. Your posts, replies, reposts, likes and follow lists are then seen only by you and followers you approve; anyone else sends a follow request, and declining it is silent. You can remove a follower without them being told, and making your account public again approves pending requests. Others can’t repost or quote your posts, and your posts don’t appear in recommendations, trends or topic feeds. Your name, bio, photo and follower counts stay public, and people can still find you in search. Photos are served from public web addresses, so don’t count on a private account to protect them. See the privacy policy.

It verifies posts: each is typed with paste and AI writing turned off, confirmed with Face ID, Touch ID or the passcode, and signed by the iPhone. Read how verification works.

No. Face ID runs entirely on your iPhone. Sincerus receives a cryptographic signature, never an image or biometric data.

Only to help you read, on your device: translation, short summaries and label suggestions. AI never writes posts, and your posts aren’t used to train AI unless you opt in. More on AI and Sincerus.

Report any post, reply, message or profile from its menu. People review every report within 24 hours. A frozen account can appeal from the sign-in screen. The rules are in the Community Guidelines.

Settings → Delete Account starts a 30-day grace period; signing in during it cancels the deletion. Settings → Privacy Rights → Download your data gives you a JSON copy of your data. See support.

Not now. Sincerus relies on Apple’s App Attest and Face ID to show that each post was written on a real iPhone.

Sincerus is an independent app made by Mehmet Ata Kartal. Reach the team at hello@sincerus.app; press details are on the press page.