# CASeasy+ vs LetterGym

The clearest difference is price: LetterGym at Free against CASeasy+'s $22.99. LetterGym also leads on update cadence (every 10 days vs every 2 months). CASeasy+'s advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads there is nothing between them.

LetterGym is free to download; CASeasy+ costs $22.99 up front. LetterGym sells 1 one-off in-app purchase. CASeasy+ asks for nothing beyond the download.

CASeasy+ ships an update every 2 months, LetterGym every 10 days. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | CASeasy+ | LetterGym |
| --- | --- | --- |
| Price | $22.99 | **Free** |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Paid | — |
| Size | 29 MB | 45 MB |
| Requires iOS | **13.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Westermann Digital GmbH](https://appshunter.io/developer/1171669560) | [Anna Puchkova](https://appshunter.io/developer/6802005284) |

## What reviewers say

### CASeasy+

[App page](https://appshunter.io/ios/app/caseasy-plus/id1479683038)

This app provides a computer algebra system designed for educational use on tablets. It simplifies solving algebraic equations with an intuitive interface and essential school-level functions. Features include a function plotter, a comprehensive calculator, and statistical analysis tools.

**Highlights:** Algebraic equation solving, Function plotter and analyzer, Comprehensive calculator with function catalog, Statistical analysis and charting, Exam mode with activity logging, Multiple user profiles for settings

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

**In-app purchases:** none


### LetterGym

[App page](https://appshunter.io/ios/app/lettergym/id6802005282)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access Forever | $3.99 | one-time |


## Frequently asked questions

### Is CASeasy+ free?

CASeasy+ costs $22.99, with no in-app purchases.

### Is LetterGym free?

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

### Do CASeasy+ or LetterGym have ads?

Neither CASeasy+ nor LetterGym shows ads.

### Which is updated more often, CASeasy+ or LetterGym?

CASeasy+ ships an update every 2 months, and LetterGym every 10 days. Most recently, CASeasy+ was updated on October 7, 2026 and LetterGym on October 17, 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.*