Pricing
Free, forever.
The full app, no strings attached. Support it if you love it.
Free
Always free · No card needed
- Full e-reader (EPUB & PDF)
- Audiobook player (MP3 & M4B)
- Markdown notebooks with live preview
- LaTeX math via KaTeX
- Flashcard decks
- Sketchbook / Excalidraw
- Reading streaks & analytics
- Six built-in themes
- 100% local, your data stays yours
Keystone
One-time · Support the project
- Everything in Free
- Early access to new features
- Community perks & channels
- Listed as a Supporter in your app profile
- Help shape the direction of Gnos
Pre-launch offer: Gnos is still in active development. Any donation now automatically earns you Keystone status when it launches.
Buy me lunch.
Gnos is a one-person project built in the evenings, on weekends, and in the in-between time when I'm not studying or working. If it saves you from another subscription, or just makes reading more enjoyable, a small donation genuinely means a lot.
Pre-launch perk: every donor right now automatically receives Keystone status when Gnos officially launches. No action needed.
Questions
Frequently asked.
Will Gnos always be free?
That's the goal. The core app (reading, audiobooks, notebooks, flashcards, and sketchbook) will be free forever. Optional cloud sync and collaboration may carry a small fee later, but everything free today stays free.
Is my data safe?
Completely. Gnos is a fully offline desktop application. Nothing leaves your computer unless you explicitly move it. No analytics, no telemetry, no tracking, ever. When optional cloud features arrive, they will always be opt-in, and we will never sell your data.
What file formats does Gnos support?
EPUB, PDF, TXT, and Markdown for reading; MP3 and M4B for audio. You can also create Markdown notebooks, flashcard decks, and Excalidraw sketchbooks natively. More formats are on the roadmap.
Can I bring my own books and content?
Yes, that's the whole idea. Gnos has no built-in store. You import your own files, and everything you put in stays yours, in your file system, in standard formats.
Why donate? What does it go toward?
Gnos is built by a single developer in their spare time. Donations help cover signing certificates (needed for macOS and Windows distribution) and developer tools, and most importantly, they motivate continued development.
Is there a mobile app?
Not yet. A mobile app for iOS and Android is on the roadmap. Sign up for early access or check the roadmap to follow progress.
Will Gnos ever have cloud features?
Eventually, yes. Optional encrypted sync and cross-device backup are planned. They will always be opt-in and never required to use the core app. See the roadmap for details.