Ichinichi
One note per day, E2E encrypted, local-first
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Look, every journaling app out there wants you to organize things into folders and tags and templates. I just wanted to write something down every day.So I built this. One note per day. That's the whole deal.- Can't edit yesterday. What's done is done. Keeps you from fussing over old entries instead of writing today's.- Year view with dots showing which days you actually wrote. It's a streak chart. Works better than it should.- No signup required. Opens right up, stores everything locally in your browser. Optional cloud sync if you want it- E2E encrypted with AES-GCM, zero-knowledge, the whole nine yards.Tech-wise: React, TypeScript, Vite, Zustand, IndexedDB. Supabase for optional sync. Deployed on Cloudflare. PWA-capable.The name means "one day" in Japanese (いちにち).The read-only past turned out to be the thing that actually made me stick with it. Can't waste time perfecting yesterday if yesterday won't let you in.Live at https://ichinichi.app | Source: https://github.com/katspaugh/ichinichi
HN · launched Mar 14, 2026 · 136 upvotes (top 7%) · 0 views
Niche: digital journaling apps · 287 launches, 21 in the last 7 days ▼ -19% · Explore this niche →
Category and tags
- Horizontal
- Vertical SaaS
- B2C
- Not AI
- Commercial product
More like this: all 287 launches in digital journaling apps →
Could you build this?
Yes A minimalist, one-note-per-day journaling app using local storage or IndexedDB with client-side Web Crypto API encryption is easily built with AI assistance.
Discussion
20 comments analyzed.
Competitors mentioned: Obsidian + Calendar plugin, iCloud calendar, Carousel (DOS diary program)
Concerns raised: Data loss on sync across devices, Can't edit past entries is too restrictive, No search function makes it write-only, Requires server deployment for mobile/desktop sync, Vendor lock-in and data portability
Feature requests: Export to plain text or markdown, Search functionality, Restore deleted notes from local database, View entries from a year ago
Competitors
Other products that read as similar to this one : 124 launches clear the similarity bar, closest 8 shown.
Attention rank: #9 of 125 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 112 days after the earliest competitor.
- DailyNote · hn · 2026-01-01 · 5 upvotes · similarity 0.62
- Tomoshibi · hn · 2026-02-28 · 25 upvotes · similarity 0.46
- Marked - Daily Journal · ph · 2026-11-08 · 2 upvotes · similarity 0.46
- NotepadWeb - Private Encrypted Notes · ph · 2026-10-06 · 1 upvotes · similarity 0.43
- Ichigo - Your Positivity Journal App · ph · 2026-09-22 · 6 upvotes · similarity 0.43
- Joonote · hn · 2026-03-21 · 54 upvotes · similarity 0.43
- Hibiki · ph · 2026-09-08 · 1 upvotes · similarity 0.42
- ComicTime · ph · 2026-11-03 · 1 upvotes · similarity 0.41
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.