Free
Everything you need for core courses, personal notes, and daily review.
$0/ forever
- ✓Up to 5 active decks
- ✓Up to 50 cards per deck
- ✓Rich note & equation editor
- ✓Distraction-free 3D flip study mode
- ✓Tags, deck search, and keyboard shortcuts
Study free. Grade paid.
Keep writing cards and reviewing on the free plan forever. Unlock unlimited cards, freehand sketching, and smart answer grading with Pro for just $2/month.
Recommended
Pro
Full-power study toolkit for students, engineers, and researchers.
$2/ month
- ✓Unlimited decks and cards
- ✓Smart answer grading (algebraic & symbolic equivalence)
- ✓Freehand whiteboard & diagram canvas on both card faces
- ✓Practice & Exam quiz modes with detailed scoring
- ✓Multi-deck & tag-filtered quiz pools
- ✓Safe downgrade policy: all existing cards and drawings are kept
Compare plan features
Transparent features with no surprise limitations.
| Feature | Free | Pro |
|---|---|---|
| Active Decks | 5 decks | Unlimited |
| Cards per Deck | 50 active cards | Unlimited |
| Rich Note & Equation Editor | Included | Included |
| Study Sessions & 3D Flip Card | Unlimited | Unlimited |
| Freehand Whiteboard & Diagrams | — | Full-screen vector canvas |
| Smart Quiz Answer Grading | — | Algebraic & symbolic equivalence |
| Practice & Exam Quiz Modes | — | Included with score summaries |
| Content Policy on Downgrade | Keep all cards | All cards and drawings retained |
Frequently asked questions
Common questions about billing, plans, and storage.
Can I study all my cards on the free plan?
Yes! The Free plan includes unlimited 3D flip card study sessions forever. You can create up to 5 decks with up to 50 cards per deck, and review them as many times as you like with zero time or session limits.
What happens to my cards and drawings if I downgrade?
You will never lose your content. All your cards, formatted notes, equations, and freehand diagrams remain intact in your account and can be reviewed in study mode forever. Plan limits only apply when creating new decks or cards beyond free tier thresholds.
How does smart answer grading work during quizzes?
Unlike traditional flashcard apps that require exact string matches, PuduFlash evaluates mathematical and symbolic equivalence. If your answer is algebraically identical to the answer key (such as reordered terms or equivalent fractions), it is automatically recognized as correct.
Can I cancel my subscription anytime?
Yes, you can cancel your subscription at any time with one click from your account preferences. Your Pro features will remain active until the end of your current billing cycle with no cancellation penalties.