# Flexi vs Math Fox

The clearest difference is in-app purchases: Math Fox at none against Flexi's 4. Math Fox also leads on iOS requirement (13.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Flexi sells 4 in-app purchases, starting at $5.99 per month. Math Fox asks for nothing beyond the download.

## The numbers

| Metric | Flexi | Math Fox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (138 ratings)](https://appshunter.io/ios/app/flexi-vocabulary-flashcards/id6499282610/reviews)** | — |
| Number of ratings | **138** | — |
| Positive reviews | 76.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Freemium | — |
| Size | 82 MB | 21 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Tomer Beilinson](https://appshunter.io/developer/1743082463) | [Fabian Ernst](https://appshunter.io/developer/6780059318) |

## What reviewers say

### Flexi

[App page](https://appshunter.io/ios/app/flexi-vocabulary-flashcards/id6499282610)

Build your vocabulary and master new languages with an AI-powered flashcard system. Create personalized cards, get instant translations and definitions, and utilize spaced repetition for effective long-term memorization. Supports numerous languages and offers offline study options.

**Highlights:** Personalized flashcard creation, AI-powered translations and definitions, Spaced repetition system, Text-to-speech pronunciation, Offline study mode, Progress tracking, CSV import/export

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $5.99 | per month |
| Premium Monthly | $5.99 | per month |
| Premium Annual | $29.99 | per year |
| Premium Lifetime | $99.99 | one-time |


### Math Fox

[App page](https://appshunter.io/ios/app/math-fox/id6780521466)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flexi free?

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

### Is Math Fox free?

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

### Do Flexi or Math Fox have ads?

Neither Flexi nor Math Fox shows ads.

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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.*