# KeyFocus vs Math. Trainer App

The clearest difference is in-app purchases: KeyFocus at none against Math. Trainer App's 1. Math. Trainer App's advantage is iOS requirement (17.6 vs 26.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Math. Trainer App sells 1 one-off in-app purchase. KeyFocus asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | KeyFocus | Math. Trainer App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/math-trainer-app/id6757082686/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 13 MB | 39 MB |
| Requires iOS | 26.5 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [moneer alabkari](https://appshunter.io/developer/1051632316) | [Blatt, Inc](https://appshunter.io/developer/1779835943) |

## What reviewers say

### KeyFocus

[App page](https://appshunter.io/ios/app/keyfocus/id1499181395)

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

**In-app purchases:** none


### Math. Trainer App

[App page](https://appshunter.io/ios/app/math-trainer-app/id6757082686)

This app helps high school students memorize math formulas quickly for exams and homework. It features a formula bank, trainer mode with spaced repetition, and progress tracking to build long-term memory and confidence.

**Highlights:** Formula Bank (Algebra, Geometry, Trigonometry), Trainer Mode with Spaced Repetition, Adaptive Learning, Progress Tracking, Customizable Repetitions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Removing ads | $1.99 | one-time |


## Frequently asked questions

### Is KeyFocus free?

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

### Is Math. Trainer App free?

Math. Trainer App is free to download, with in-app purchases available.

### Do KeyFocus or Math. Trainer App have ads?

Both KeyFocus and Math. Trainer App show ads.

### Which is updated more often, KeyFocus or Math. Trainer App?

KeyFocus ships an update every 3 weeks, and Math. Trainer App every 3 weeks. Most recently, KeyFocus was updated on September 26, 2026 and Math. Trainer App on October 7, 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.*