Free to start.
Cheap to keep.
Everything that makes Tilia work — the reader, the dictionary, flashcards, quizzes, the vocabulary test — is free. Pro only removes the two limits we actually enforce.
Free
For seeing whether this changes how you read.
- Two books in your library at a time — remove one and the slot comes back
- Unlimited flashcards and quizzes from those books
- The full adaptive vocabulary test
- Tap-to-define, highlights, progress, streaks
- Join as many co-reads as you like — joining is never paywalled
- Host one co-read at a time
Pro
For the shelf that doesn’t stop at two.
- Unlimited books in your library
- Host unlimited co-reads at the same time
- Everything in Free, with no caps
- Every future Pro feature, included as it ships
- Keeps an independent app independent
Prices shown in US dollars. Subscriptions are bought inside the app through the App Store or Google Play, which set the equivalent price for your country — and where you cancel, any time.
Questions people actually ask
What happens when I hit two books?
Nothing disappears. You can remove a book to free the slot — which also removes its cards and progress — or upgrade to keep everything. Books someone invited you into don’t count against the two while the co-read is running.
Is the vocabulary test really free?
Yes, and you don’t even need the app or an account — take it in your browser. It’s the same adaptive test that runs inside Tilia.
Do I need a credit card to start?
No. The free plan asks for nothing but an account, and there is no trial to forget to cancel.
Is lifetime really one payment?
One payment, no renewal, and it stays valid for future Pro features. It’s a launch-window offer to the people who back the app early, and it goes away when the window closes.
Can I cancel?
Any time, from your App Store or Google Play subscription settings. You keep Pro until the period you already paid for ends, then your library reverts to the free limits — extra books become read-only rather than being deleted, and unlock again if you resubscribe or make room.