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A private journal. No sign-up needed.

No account·Local by default·Not used to train models·No ads

Every other journal app gives you:

  • Streak counters
  • Mood scores
  • One-tap share to feeds
  • Daily push reminders
  • Habit leaderboards
  • Public squares and comment sections
  • An algorithm's portrait of "who you are"
  • Your words pulled into model training
  • Your behavior data sold to advertisers

Rainku.

A private journal.
Anonymous and local by default.
Sign in only when you want sync.

Anonymous mode

You don't have to hand yourself over.

Open the browser and start writing. No account, no email, no third-party sign-in. Entries live in the browser's local database on your device — close the tab and they're still there. When you want to sync across devices, that's the moment to think about signing in.

No sign-up·Browser-local·No upload by default·Persists after close
The core

You only need to talk.

Turn on the rain and start talking. The AI listens on the other side and asks a few follow-ups that keep up with your train of thought. After the conversation, the day's entry appears on its own.

Rain ambience·Voice input·AI conversation·Auto-composed

Private by default.

Every conversation runs over an encrypted channel. What you write isn't pulled into model training. You can export everything in one click and delete your account at the root. The field-level list lives in the privacy policy.

Encrypted in transit·Not used for training·Exportable·Deletable
Atmosphere

Your rain.

Amount. Speed. Fog. Refraction. Four sliders that tune the rain into the one you want.

Timeline

Your trail.

Every entry filed by date. Flip back through the calendar to a day a few weeks ago — autosaved. Turn one into a poster if you want to share it; if not, just keep it.

Calendar·Autosave·Poster export

Open Rainku.

A private journal. Anonymous and local by default.

Start writing
Private journal. No sign-up needed. | Rainku