- Updated: March 14, 2026
- 1 min read
Ichinichi: Secure Daily Journaling App with End‑to‑End Encryption
Ichinichi – One Note Per Day, End‑to‑End Encrypted, Local‑First
Today we spotlight Ichinichi, a new journaling web app that lets users write a single note each day. The app stores entries locally first and then syncs them to Supabase, but all data is encrypted on the client side before it ever leaves the browser. Users protect their notes with a password; the password encrypts the decryption keys, so changing the password only re‑encrypts those keys, not the entire journal.
Key features include:
- End‑to‑end encryption with password‑derived keys.
- Read‑only past entries, ensuring a fixed historical record.
- Configurable daily rollover time, allowing users to define when a new day starts.
- Local‑first architecture with optional Supabase sync for backup.
Community members asked about the encryption flow and daily rollover. The creator explained that encryption happens client‑side, and the rollover can be adjusted in the settings, so a day can end at any chosen hour.
For a deeper dive, see the original discussion on Hacker News. Explore related content on our site: UBOS Blog, Product Features, and Contact Us for more information.
Andrii Bidochko
CTO UBOS
Andrii Bidochko is an AI entrepreneur and researcher focused on AI agents, reinforcement learning, and autonomous systems. He writes about the technologies shaping the future of machine intelligence, from frontier models and agent architectures to real-world AI applications.