# O vs Math. Trainer App

The clearest difference is update cadence: Math. Trainer App at every 3 weeks against O's every 29 months. O's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. O sells 2 in-app purchases, starting at $0.99 per 3 months and Math. Trainer App sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

O ships an update every 29 months, Math. Trainer App every 3 weeks. Both last shipped on October 7, 2026.

## The numbers

| Metric | O | 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 | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 29 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 76 MB | 39 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Albert Mungochi](https://appshunter.io/developer/1724993311) | [Blatt, Inc](https://appshunter.io/developer/1779835943) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-level-mathematics-revision/id6478979508)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Quarterly | $0.99 | per 3 months |
| Premium Annual | $2.99 | per year |


### 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 O free?

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

### Is Math. Trainer App free?

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

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

Both O and Math. Trainer App show ads.

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

O ships an update every 29 months, and Math. Trainer App every 3 weeks. Most recently, O was updated on October 7, 2026 and Math. Trainer App on October 7, 2026.

---

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