Simple pricing
Start free. When you're ready for active recall, Pro unlocks everything — and the first 7 days are free.
Free
Get a feel for Osseo, no card required.
$0/forever
- First 100 bones
- Basic quiz
- 3 friend challenges per day
- Preview Pro features (locked)
7 days free · then $39.99/year
Pro
Everything unlocked. Built for active recall.
$39.99/year
Best value — works out to $3.33/month, saving $19.89 vs monthly.
- All 206 bones
- Practice, Exam, Scenarios, Draw, Editor
- Spaced repetition + offline downloads
- Unlimited friend challenges
- Custom study schedules & reminders
No charge until day 8. Cancel anytime.
What's included
| Feature | Free | Pro |
|---|---|---|
| Bones available to study | First 100 | All 206 |
| Basic quiz mode | ||
| Friend challenges | 3 plays / day | Unlimited |
| Preview Pro features (locked) | ||
| Timed Practice mode | ||
| Full Exam mode + AI exam packs | ||
| USMLE-style Case Scenarios | ||
| Drawing tool with overlays | ||
| Custom Quiz Editor | ||
| Spaced-repetition flashcard quiz | ||
| Offline downloads (images + decks) | ||
| Custom study schedules + reminders |
When does the paywall appear?
- Free forever: the first 100 bones, basic quiz, and 3 daily friend challenges.
- Locked teasers: Practice, Exam, Scenarios, Draw, Editor, and the last 106 bones are visible but show an upgrade screen when opened.
- Daily challenge cap: after 3 plays in a day, the next challenge prompts you to upgrade. Resets at midnight UTC.
- Upgrading starts a 7-day free trial — you won't be charged if you cancel before it ends.