# Karate Do vs GainMatrix

The clearest difference is in-app purchases: Karate Do at none against GainMatrix's 4. Karate Do also leads on iOS requirement (13.4 vs 15.1). GainMatrix's advantage is update cadence (weekly vs every 13 months). On price, ads and device support there is nothing between them.

Both are free to download. GainMatrix sells 4 in-app purchases, starting at $2.99 per month. Karate Do asks for nothing beyond the download.

Karate Do ships an update every 13 months, GainMatrix weekly. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Karate Do | GainMatrix |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Weekly** |
| Size | 35 MB | 64 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Arbox LTD](https://appshunter.io/developer/1021244486) | [Ulas Uzunyayla](https://appshunter.io/developer/1858691953) |

## What reviewers say

### Karate Do

[App page](https://appshunter.io/ios/app/karate-do/id1590126973)

**Features:** macOS Compatibility

**In-app purchases:** none


### GainMatrix

[App page](https://appshunter.io/ios/app/gainmatrix-ai-workout-tracker/id6756138508)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GainMatrix Pro | $2.99 | per month |
| GainMatrix Pro | $4.99 | per month |
| GainMatrix Pro | $17.99 | per year |
| GainMatrix Pro | $24.99 | per year |


## Frequently asked questions

### Is Karate Do free?

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

### Is GainMatrix free?

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

### Do Karate Do or GainMatrix have ads?

Neither Karate Do nor GainMatrix shows ads.

### Which is updated more often, Karate Do or GainMatrix?

Karate Do ships an update every 13 months, and GainMatrix weekly. Most recently, Karate Do was updated on October 10, 2026 and GainMatrix on October 4, 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.*