# LOOPIPE vs Index Sums

The clearest difference is update cadence: Index Sums at every 3 weeks against LOOPIPE's every 7 months. LOOPIPE's advantage is iOS requirement (15.0 vs 17.6). On price, ads, 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.

LOOPIPE ships an update every 7 months, Index Sums every 3 weeks. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | LOOPIPE | Index Sums |
| --- | --- | --- |
| 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 | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 94 MB | 25 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [eB Soft Inc.](https://appshunter.io/developer/384289998) | [ZORIX LLC](https://appshunter.io/developer/1814371874) |

## What reviewers say

### LOOPIPE

[App page](https://appshunter.io/ios/app/loopipe/id1443753792)

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is LOOPIPE free?

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

### Is Index Sums free?

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

### Do LOOPIPE or Index Sums have ads?

Neither LOOPIPE nor Index Sums shows ads.

### Which is updated more often, LOOPIPE or Index Sums?

LOOPIPE ships an update every 7 months, and Index Sums every 3 weeks. Most recently, LOOPIPE was updated on October 2, 2026 and Index Sums on October 9, 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.*