Two AI flashcard apps with very different DNA. Gizmo leans into gamified daily study; GoodOff is built around FSRS spaced repetition for long-term retention.
Both have AI generation and gamification. Where they differ: algorithm transparency, voice mode, offline support, and price.
| Feature | GoodOff | Gizmo |
|---|---|---|
| Spaced repetition algorithm | FSRS by default | Spaced repetition (algorithm unspecified) |
| Voice tutor | Yes, hands-free study | No |
| Pomodoro timer | Built in | No |
| AI flashcard generation | Gemini Pro, 90+ formats | AI from PDF, YouTube, PowerPoint, Notes, Quizlet |
| Offline study | Yes | Limited; reviewers cite lack of offline |
| Gamification | XP, streaks, leaderboards | Lives, streaks, "addictive" loops |
| Free tier | $0 forever, 25 AI credits/mo, unlimited manual cards | 15 daily lives, up to 10 AI quizzes/day |
| Paid tier (entry) | Pro $4.99/mo or $49.99/yr | ~$8.80/mo or $52.80/yr |
| Top tier | Max $29.99/mo | Higher tiers reported up to ~$159/yr |
GoodOff uses FSRS, the open-source spaced repetition scheduler that has published benchmarks and exposes stability, difficulty, and retrievability per card. Gizmo offers spaced repetition, but reviewers report tuning issues on decks over 100 cards — older cards getting skipped while newer ones repeat.
Pre-configured FSRS, no setup
Benchmarked against alternative schedulers
Scales cleanly past 1,000+ cards
GoodOff has a built-in voice tutor — ask questions, get explanations, study while commuting or exercising. Gizmo does not currently offer a voice mode; study sessions happen at the screen.
Conversational explanations
Hands-free review on the go
Powered by Gemini Pro
GoodOff Pro is $4.99/mo or $49.99/yr. Gizmo is most commonly cited at $8.80/mo or $52.80/yr, with higher tiers reported up to $159/yr. For students paying out of pocket, that gap matters.
Pro $4.99/mo includes AI generation, voice tutor, ad-free
Standard $8.99/mo for active learners
Max $29.99/mo for power users
Yes. The Free plan is $0 forever and includes FSRS spaced repetition, unlimited manual flashcards, and 25 AI credits per month. Gizmo has a free tier as well, but limits AI quizzes to 10 per day and uses a "lives" mechanic.
Decks export to standard flashcard formats and import cleanly. You can also re-generate from the source files (PDFs, YouTube, PowerPoints) using GoodOff's AI.
Gizmo's gamification depth and 'addictive learning' loops are well-tuned, and the brand has been around longer with established reviews on multiple AI tool directories. If gamified daily quizzing is the primary driver for you, Gizmo is a strong fit.
FSRS spaced repetition by default with documented benchmarks, a built-in voice tutor for hands-free study, a Pomodoro timer, broader file-format support (90+ including DOCX, MP4, EPUB), full offline study, and a lower entry price ($4.99/mo vs $8.80/mo).
User reviews on Smartpostly, Techpoint, and AllAboutAI report that Gizmo's spaced repetition struggles with decks over 100 cards — older cards get skipped while newer ones repeat. GoodOff uses FSRS, which is specifically designed to scale across thousands of cards without that problem.
Last updated: April 26, 2026. Gizmo feature and pricing data verified from gizmo.ai and 2026 third-party reviews on AllAboutAI, Smartpostly, and Techpoint. Pricing varies by promotion and region.
FSRS by default, voice tutor included, half the price. Free forever to start.
