# SUM vs Number Puzzle

The clearest difference is in-app purchases: Number Puzzle at none against SUM's 1. SUM's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. SUM sells 1 one-off in-app purchase. Number Puzzle asks for nothing beyond the download.

SUM ships an update every 3 days, Number Puzzle every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | SUM | Number Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 days | **Every 2 days** |
| Size | 110 MB | 104 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | +4 | 4+ |
| Developer | [Alex van Rooijen](https://appshunter.io/developer/1874390384) | [RESTPLACE, K.K.](https://appshunter.io/developer/6801984652) |

## What reviewers say

### SUM

[App page](https://appshunter.io/ios/app/sum-quiet-math-puzzles/id6804407416)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SUM Premium | $3.99 | one-time |


### Number Puzzle

[App page](https://appshunter.io/ios/app/number-puzzle-brain-training/id6813728337)

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

**In-app purchases:** none


## Frequently asked questions

### Is SUM free?

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

### Is Number Puzzle free?

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

### Do SUM or Number Puzzle have ads?

Number Puzzle shows ads; SUM does not.

### Which is updated more often, SUM or Number Puzzle?

SUM ships an update every 3 days, and Number Puzzle every 2 days. Most recently, SUM was updated on October 31, 2026 and Number Puzzle on October 31, 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.*