# Feynman vs Gizmo

The clearest difference is in-app purchases: Feynman at none against Gizmo's 10. Feynman also leads on iOS requirement (9.0 vs 16.4). Gizmo's advantage is chart position (#25 vs unranked). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Gizmo sells 10 in-app purchases, starting at $6.99 per 7 days. Feynman asks for nothing beyond the download.

Feynman ships an update every 3 days, Gizmo every 4 days. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Feynman | Gizmo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (17K ratings)](https://appshunter.io/ios/app/gizmo-ai-tutor/id1610516671/reviews)** |
| Number of ratings | — | **17K** |
| Positive reviews | — | 65.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | **#25** |
| Size | 17 MB | 195 MB |
| Requires iOS | **9.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Hassan Mohamed](https://appshunter.io/developer/1484659884) | [GIZMO AI LTD](https://appshunter.io/developer/1599281873) |

## What reviewers say

### Feynman

[App page](https://appshunter.io/ios/app/feynman/id1486605848)

**Features:** macOS Compatibility

**In-app purchases:** none


### Gizmo

[App page](https://appshunter.io/ios/app/gizmo-ai-tutor/id1610516671)

**Currently charting:** #25 Top Free · Education, #26 Top Grossing · Education (US App Store)

Transform any content into interactive flashcards and quizzes with AI. Utilize spaced repetition and active recall for effective learning, or explore a vast library of pre-made study decks. Gamified features make studying engaging and fun.

**Highlights:** AI content import, Scan handwritten notes, Interactive quizzing, Spaced repetition, Pre-made flashcard decks, Study organization, Gamified learning

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gizmo Unlimited | $6.99 | per 7 days |
| Gizmo Unlimited | $12.99 | per month |
| Gizmo Unlimited | $14.99 | per 7 days |
| Gizmo Unlimited | $24.99 | per month |
| Gizmo Unlimited | $51.00 | per year |
| Gizmo Unlimited | $77.99 | per year |
| Gizmo Unlimited | $154.99 | per year |
| 1000 Coins | $1.99 | one-time |
| 5000 Coins | $4.99 | one-time |
| 100,000 Coins | $39.99 | one-time |

**What reviewers like**

- 🚀 Helpful for studying and learning
- 👍 Engaging and motivating features
- 🎓 Useful for students and academics
- 🤖 Effective AI-powered tools

**What reviewers complain about**

- 🐛 Buggy and glitchy at times
- ⏱️ Restrictive time limits and lives system
- 💰 Pushing for paid subscription
- 🌐 Limited language support

**Reported bugs**

- Flashcards not saving properly
- Importing notes/PDFs not working reliably
- Freezing and crashing issues
- Inconsistent behavior across platforms

**Requested features**

- Allow more customization of flashcards
- Improve stability and reduce glitches
- Provide more language options
- Offer a way to delete decks permanently


## Frequently asked questions

### Is Feynman free?

Feynman is free to download, with no in-app purchases.

### Is Gizmo free?

Gizmo is free to download, with in-app purchases available.

### Do Feynman or Gizmo have ads?

Neither Feynman nor Gizmo shows ads.

### Which is updated more often, Feynman or Gizmo?

Feynman ships an update every 3 days, and Gizmo every 4 days. Most recently, Feynman was updated on November 3, 2026 and Gizmo on November 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*