# Combinatoria vs Just Sum! Number Logic Puzzle

The clearest difference is iOS requirement: Combinatoria at 15.1 against Just Sum! Number Logic Puzzle's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Combinatoria | Just Sum! Number Logic Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Weekly | Weekly |
| Size | 77 MB | 8 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Volodymyr Rebrov](https://appshunter.io/developer/1718915438) | [Yuma Ueno](https://appshunter.io/developer/1842015188) |

## What reviewers say

### Combinatoria

[App page](https://appshunter.io/ios/app/combinatoria/id6755707764)

**Features:** macOS Compatibility

**In-app purchases:** none


### Just Sum! Number Logic Puzzle

[App page](https://appshunter.io/ios/app/just-sum-number-logic-puzzle/id6797523299)

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

**In-app purchases:** none


## Frequently asked questions

### Is Combinatoria free?

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

### Is Just Sum! Number Logic Puzzle free?

Just Sum! Number Logic Puzzle is free to download, with no in-app purchases.

### Do Combinatoria or Just Sum! Number Logic Puzzle have ads?

Both Combinatoria and Just Sum! Number Logic Puzzle show ads.

### Which is updated more often, Combinatoria or Just Sum! Number Logic Puzzle?

Combinatoria ships an update weekly, and Just Sum! Number Logic Puzzle weekly. Most recently, Combinatoria was updated on October 28, 2026 and Just Sum! Number Logic Puzzle on October 29, 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.*