DailyNote
one-note-per-day app with local-first encryption
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Hi HN and Happy New Year!I built DailyNote, a minimalist daily notes app: one note per day, a year-at-a-glance calendar, and local-first storage.The interesting bit is the encryption + sync model: - Notes are always encrypted locally before syncing to Supabase. - A dedicated data key (DEK) encrypts notes; your password only wraps that DEK (KEK). - So when you change your password, it just re-wraps the DEK — no re-encryption of note data. I built the whole project in one day using Claude + Codex with a spec‑driven approach (tight PRD → implementation). It’s React/TypeScript, IndexedDB for local persistence, and optional cloud sync.Demo: https://dailynote.xyz/Repo: https://github.com/katspaugh/dailynoteWould love feedback on the crypto model, UX, or anything else.
HN · launched Jan 1, 2026 · 5 upvotes (top 90%) · 0 views
Niche: note-taking and writing apps · 264 launches, 27 in the last 7 days ▼ -23% · Explore this niche →
Category and tags
- Horizontal
- Vertical SaaS
- B2C
- Not AI
- Commercial product
More like this: all 264 launches in note-taking and writing apps →
Could you build this?
Yes A minimalist calendar note-taking application using the Web Crypto API (or Libsodium) for client-side encryption synced to Supabase is a classic vibe-coding project.
Discussion
5 comments analyzed.
Competitors mentioned: Bouquin (similar one-note-per-day design with encryption)
Concerns raised: Notifications could be significantly better, Markdown syntax not working (# and * symbols), No version control/history tracking
Feature requests: Version control with git diff-style interface to revert changes, Live markdown syntax highlighting and code blocks, Tagging and search functionality, Image support in notes, Auto-carry incomplete TODO items to next day
Competitors
Other products that read as similar to this one : 204 launches clear the similarity bar, closest 8 shown.
Attention rank: #202 of 205 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 48 days after the earliest competitor.
- Ichinichi · hn · 2026-03-14 · 136 upvotes · similarity 0.62
- NotepadWeb - Private Encrypted Notes · ph · 2026-10-06 · 1 upvotes · similarity 0.53
- Micro Notes: Private & Simple · ph · 2026-10-24 · 1 upvotes · similarity 0.49
- Coffre — your notes, encrypted · ph · 2026-10-22 · 1 upvotes · similarity 0.48
- MinkNote · ph · 2026-07-24 · 157 upvotes · similarity 0.44
- Notoria – personal notebook and diary · ph · 2026-09-12 · 1 upvotes · similarity 0.43
- Joonote · hn · 2026-03-21 · 54 upvotes · similarity 0.43
- Digital Diary · ph · 2026-09-15 · 1 upvotes · similarity 0.42
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