# Index Sums vs Loop Logic

The clearest difference is in-app purchases: Index Sums at none against Loop Logic's 1. Loop Logic's advantage is iOS requirement (13.0 vs 17.6). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Index Sums | Loop Logic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/index-sums/id6745894447/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | Free | — |
| Size | 25 MB | 34 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZORIX LLC](https://appshunter.io/developer/1814371874) | [VM Mobile Team](https://appshunter.io/developer/646128457) |

## What reviewers say

### Index Sums

[App page](https://appshunter.io/ios/app/index-sums/id6745894447)

Engage your mind with a Japanese number logic puzzle. Fill grids based on row and column sums, using pure logic to reveal hidden patterns. Offers multiple difficulty levels and daily challenges for continuous mental stimulation.

**Highlights:** Row and column sum logic puzzles, Multiple difficulty levels, Daily challenges, Progress tracking and statistics, Offline play, Customizable themes, Haptic feedback

**Features:** macOS Compatibility

**In-app purchases:** none


### Loop Logic

[App page](https://appshunter.io/ios/app/loop-logic-logic-puzzle/id6761312632)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is Index Sums free?

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

### Is Loop Logic free?

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

### Do Index Sums or Loop Logic have ads?

Neither Index Sums nor Loop Logic shows ads.

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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.*