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A journal that reads itself back to you. You write — a few sentences a night, in your voice. Cotidie reads them, slowly, and surfaces the patterns you'd been making without noticing. It does not generate. It does not score. It does not show you a feed. — 7 AI personas. Two free. One for every kind of night. — A Private Vault on your device. Never synced. Never seen by AI. — Voice dictation. Pattern insights. 10 languages. For the people who quit journaling at week three. iOS + Android. Free.
Hi Product Hunt 🤍
I'm Casper. I built Cotidie because I'm the worst journaler I know.
Every notebook I've started died at week three. Every "AI journal" I tried did one of three things that made me close it: generated content I'd never write, scored my mood out of ten, or shamed me for skipping a day.
So I built the opposite.
→ Cotidie doesn't write for you. You write a few sentences a night. The AI reads them — slowly, over weeks — and quietly surfaces patterns you'd been making without noticing. It hands you back what you'd already been writing.
→ There's a Private Vault that lives on your device only. Never synced. Never seen by the AI. Biometric-locked. Took us one stubborn month to wire that part right — and we have nothing to do with it after.
→ Seven AI personas. Sage when you want a guide. Kai when you want truth. Ash when you don't want a coach — just someone who sits with you. Not every night needs the same kind of company.
→ No streaks. No feed. No mood scores. No public profile. The rarest feature in 2026, honestly.
I'd love to know — what would make you actually keep a journal? And what would you want from one that reads itself back?
Thank you for reading. — c.
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About Cotidie on Product Hunt
“The AI journal that reads you back.”
Cotidie was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #64 on the daily leaderboard. A journal that reads itself back to you. You write — a few sentences a night, in your voice. Cotidie reads them, slowly, and surfaces the patterns you'd been making without noticing. It does not generate. It does not score. It does not show you a feed. — 7 AI personas. Two free. One for every kind of night. — A Private Vault on your device. Never synced. Never seen by AI. — Voice dictation. Pattern insights. 10 languages. For the people who quit journaling at week three. iOS + Android. Free.
Cotidie was featured in Android (57.3k followers), Productivity (653.9k followers), Writing (59.2k followers) and Artificial Intelligence (471.1k followers) on Product Hunt. Together, these topics include over 292.7k products, making this a competitive space to launch in.
Who hunted Cotidie?
Cotidie was hunted by Aydın Türe. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Aydın Türe