The only flashcard app that combines AI extraction, spaced repetition, quiz games, and a public deck library — all in one place.
| Feature | Words on Repeat | AnkiDecks | Anki | Quizlet | Memrise | Brainscape |
|---|---|---|---|---|---|---|
| Pricing | ||||||
| Free tier | Yes | Yes (limited) | Yes (desktop) | Yes (limited) | Yes (limited) | Yes (very limited) |
| Paid price (monthly) | $5.99/mo | $7.99/mo | N/A | $3.00/mo | $6.67/mo | $7.99/mo |
| Paid price (annual) | $59/yr | $60/yr | $24.99 iOS one-time | $35.99/yr | $79.99/yr | $95.88/yr |
| Free Tier Limits | ||||||
| Decks | 10 | 4 generations/mo | Unlimited | Unlimited | N/A (courses) | Very limited |
| Words / Cards | 1,000 | Unlimited | Unlimited | Unlimited | Limited | ~100/deck |
| AI features on free | ✓ 5 extractions/mo | ✓ 4 generations/mo | ✗ | ✗ | ✗ | ✗ |
| AI & Content Import | ||||||
| AI vocabulary extraction | ✓ | ✓ | ✗ | Paid only | ✗ | Paid only |
| YouTube subtitle import | ✓ (Pro) | ✓ | ✗ | ✗ | ✗ | ✗ |
| Import from URL / PDF | ✓ | ✓ | ✗ | ✗ | ✗ | ✗ |
| Anki import / export | ✓ (Pro) | ✓ (.apkg export) | Native | ✗ | ✗ | ✗ |
| Study & Algorithm | ||||||
| Spaced repetition | FSRS | FSRS | FSRS | Basic | Basic SRS | CBR |
| Quiz games | ✓ 4 modes | ✓ | ✗ | Paid only | ✗ | ✗ |
| Daily goals & streaks | ✓ | ✗ | Add-on | ✗ | ✓ | ✗ |
| Push reminders | ✓ | ✗ | ✗ | ✗ | App only | ✗ |
| Platform | ||||||
| Works in browser | ✓ | ✓ | ✗ | ✓ | ✓ | ✓ |
| Offline support | ✓ (PWA) | PWA | ✓ | Paid only | ✗ | Partial |
| Install as app (PWA) | ✓ | ✓ | N/A | N/A | N/A | N/A |
| Dark mode | ✓ | ✗ | Add-on | ✓ | ✓ | ✗ |
| Data export | ✓ | ✓ (.apkg) | ✓ | Limited | ✗ | ✗ |
| Open source | ✗ | ✗ | ✓ | ✗ | ✗ | ✗ |
Other apps do one thing well. Words on Repeat does everything — extract vocabulary from any source, study with FSRS, play quiz games, browse ready-made public decks, and get daily reminders — without switching between tools.
Strong AI extraction with YouTube and PDF support. But AnkiDecks is a deck generator — it lacks daily goals, push reminders, and dark mode. You still need a separate app to study properly. WoR handles both creation and study in one place.
Powerful, free on desktop, and open source. But no AI extraction, no browser access, and basic features like dark mode or daily goals require add-ons. Steep learning curve. WoR gives you the same FSRS algorithm with a modern, ready-to-use interface.
Popular and affordable at $35.99/yr. But AI features and quiz games are paywalled, spaced repetition is basic, and there are no push reminders or daily goals. WoR includes all of these on the free tier.
Good for course-based learning with built-in daily goals. But expensive at $79.99/yr, no AI extraction, no data export, and push notifications only work in their native app. WoR gives you more features for less.
Confidence-based repetition with a clean interface. But the most expensive option at $95.88/yr, a very limited free tier, no AI extraction, no dark mode, and no data export. WoR offers more at every price point.
Feature and pricing data based on publicly available information as of May 2026. Trademarks belong to their respective owners.