# Kokomonster vs SumXMinus

The clearest difference is in-app purchases: SumXMinus at none against Kokomonster's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Kokomonster sells 3 in-app purchases, starting at $9.99 per month. SumXMinus asks for nothing beyond the download.

Kokomonster ships an update monthly, SumXMinus every 6 weeks. The most recent releases landed on October 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Kokomonster | SumXMinus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Monthly** | Every 6 weeks |
| Size | 110 MB | 32 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TIOM AI limited](https://appshunter.io/developer/1831188034) | [Katsuhiko Yao](https://appshunter.io/developer/1543188534) |

## What reviewers say

### Kokomonster

[App page](https://appshunter.io/ios/app/kokomonster/id6462056577)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Semi-annual Subscription | $49.99 | per 6 months |
| Annual Subscription | $89.99 | per year |


### SumXMinus

[App page](https://appshunter.io/ios/app/sumxminus-negative-math/id6480327347)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kokomonster free?

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

### Is SumXMinus free?

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

### Do Kokomonster or SumXMinus have ads?

Both Kokomonster and SumXMinus show ads.

### Which is updated more often, Kokomonster or SumXMinus?

Kokomonster ships an update monthly, and SumXMinus every 6 weeks. Most recently, Kokomonster was updated on October 11, 2026 and SumXMinus on October 25, 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.*