The calm ebook reader
Read,
unhurried.
your calm sky ✦
A beautiful, local-first reader that gets out of your way — so it's just you and the book.
The reader
Everything you need. Nothing you don't.
Made for slow reading ↓ 01
Type worth savouring
Elegant serif, Paper · Sepia · Night, and a true two-page spread. Every book looks the way it deserves to. 02
Built for deep focus
A distraction-free Focus mode, footnote-aware read-aloud, and highlights, notes and stats that reward slow reading. 03
The cloud, only if you want it
Nimbus Plus adds encrypted sync, hosted AI and premium voices. Optional, always — the free reader stays whole.Local-first by design
Your books never leave
your hands.
Nimbus runs entirely on your device. Your library, your highlights, and your place in every book stay with you — there's no account to read, nothing tracked, and nothing to sell, because none of it ever reaches us.
No account to readImport a book and start. No sign-up, no email, no paywall in the way.
Nothing tracked or soldNo ads, no reading analytics, no data business — there simply isn't one here.
The cloud stays optionalSync and backup are opt-in and end-to-end encrypted. Or keep everything offline, for good.
Choose your Nimbus
The reader is free forever. Pay only for the cloud — sync, AI and voices — if and when you want it.
Nimbus
$0 free forever
- The whole reader — themes, typography, two-page spread
- Focus mode, read-aloud, search & contents
- Highlights, notes & Markdown export
- Everything stays on your device
Most loved
Nimbus Plus
$6 /mo · $54/yr
- Everything in Nimbus, plus:
- Encrypted sync & backup across devices
- Hosted AI — ask, explain, translate
- Premium reading voices
Nimbus Lifetime
$149 one-time
- Everything in Nimbus, plus:
- Sync via your own iCloud / Dropbox
- Bring-your-own-key AI, at your cost
- No subscription, ever