# Sum Loop vs Mathdoku

The clearest difference is in-app purchases: Mathdoku at none against Sum Loop's 1. Mathdoku also leads on update cadence (every 4 days vs every 4 months). Sum Loop's advantage is iOS requirement (14.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Sum Loop sells 1 one-off in-app purchase. Mathdoku asks for nothing beyond the download.

Sum Loop ships an update every 4 months, Mathdoku every 4 days. The most recent releases landed on June 1, 2026 and May 19, 2026 respectively.

## The numbers

| Metric | Sum Loop | Mathdoku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sum-loop/id6447087917/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 6 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Goro Sato](https://appshunter.io/developer/412448991) | [Ting Yeung](https://appshunter.io/developer/1773356322) |

## What reviewers say

### Sum Loop

[App page](https://appshunter.io/ios/app/sum-loop/id6447087917)

A challenging puzzle game where players place blocks into overlapping loops to match displayed sums. Offers multiple solutions for each puzzle, providing replayability. Designed for quick, engaging gameplay.

**Highlights:** Match sums in overlapping loops, Place blocks to solve puzzles, Multiple solutions per puzzle, Challenging gameplay, Intuitive block placement

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Mathdoku

[App page](https://appshunter.io/ios/app/mathdoku-daily-challenge/id6752537643)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sum Loop free?

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

### Is Mathdoku free?

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

### Do Sum Loop or Mathdoku have ads?

Both Sum Loop and Mathdoku show ads.

### Which is updated more often, Sum Loop or Mathdoku?

Sum Loop ships an update every 4 months, and Mathdoku every 4 days. Most recently, Sum Loop was updated on June 1, 2026 and Mathdoku on May 19, 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.*