Get F³ for Mac
The AI agent that reads, maps, and fills your PDF forms — so you never fill one by hand again. Viewing, annotating and signing PDFs stay free forever, and every AI feature is free to try for 30 days.
Try it free
Get the app and use it free — view, annotate and sign PDFs forever, plus a 30-day free trial of the AI features. Bring your own Gemini key. No credit card required.
Become a founding member
Unlock every AI feature forever on one Mac for a one-time $10 — our launch thank-you to the first 1,000 founders (or the first 30 days, whichever comes first). Your license key arrives instantly by email.
Become a founder — $10 lifetimeOne Mac · yours forever · bring your own Gemini key
Regular price after launch: $6/mo or $50/yr.
How pricing works. F³ is free to view, sign and annotate PDFs — always. The AI features are free to try for 30 days. During launch, the first 1,000 founding members (or the first 30 days, whichever comes first) unlock the AI forever for a one-time $10. After that, the AI is a subscription — $6/mo or $50/yr. This founding deal is a limited launch offer, not a bait-and-switch: founders keep their lifetime license for good.