# The Sum vs One Left

The clearest difference is ads: One Left at none against The Sum's shown. The Sum's advantage is iOS requirement (13.0 vs 17.6). On price, update cadence, in-app purchases and device support there is nothing between them.

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

The Sum ships an update every 3 weeks, One Left monthly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | The Sum | One Left |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 144 MB | 14 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [LIM SING CHYUAN](https://appshunter.io/developer/1825404821) | [Alexandre Brotto Rangel da Silva](https://appshunter.io/developer/1868933438) |

## What reviewers say

### The Sum

[App page](https://appshunter.io/ios/app/the-sum-math-and-puzzle/id6757253249)

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

**In-app purchases:** none


### One Left

[App page](https://appshunter.io/ios/app/one-left-peg-solitaire/id6757789359)

**In-app purchases:** none


## Frequently asked questions

### Is The Sum free?

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

### Is One Left free?

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

### Do The Sum or One Left have ads?

The Sum shows ads; One Left does not.

### Which is updated more often, The Sum or One Left?

The Sum ships an update every 3 weeks, and One Left monthly. Most recently, The Sum was updated on October 25, 2026 and One Left on October 28, 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.*