# Ripple Effect vs Index Sums

Ripple Effect and Index Sums both sit at 5.0 stars, but that hides the real split: 100% of Index Sums's written reviews are positive against 30% of Ripple Effect's. Index Sums also leads on update cadence (every 3 weeks vs every 24 months). Ripple Effect's advantage is iOS requirement (8.0 vs 17.6). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Ripple Effect against 5.0 for Index Sums. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews are what separate them: 30% of Ripple Effect's written reviews are positive against 100% of Index Sums's.

Ripple Effect ships an update every 24 months, Index Sums every 3 weeks. The most recent releases landed on June 1, 2026 and June 24, 2026 respectively.

## The numbers

| Metric | Ripple Effect | Index Sums |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/ripple-effect/id1139541148/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/index-sums/id6745894447/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | 30.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 16 MB | 25 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Fujimoto](https://appshunter.io/developer/467085185) | [ZORIX LLC](https://appshunter.io/developer/1814371874) |

## What reviewers say

### Ripple Effect

[App page](https://appshunter.io/ios/app/ripple-effect/id1139541148)

A logic puzzle game where players fill grids with consecutive integers based on room size. It features rules about number placement to ensure separation between identical digits in rows and columns.

**Highlights:** Consecutive integer placement, Room-based puzzle mechanics, Row and column separation rules, Challenging logic puzzles, Grid-based gameplay

**Features:** macOS Compatibility

**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 Ripple Effect free?

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

### Is Index Sums free?

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

### Which has better reviews, Ripple Effect or Index Sums?

Ripple Effect and Index Sums are both rated 5.0 out of 5 on the App Store, from 3 and 3 ratings respectively.

### Do Ripple Effect or Index Sums have ads?

Neither Ripple Effect nor Index Sums shows ads.

### Which is updated more often, Ripple Effect or Index Sums?

Ripple Effect ships an update every 24 months, and Index Sums every 3 weeks. Most recently, Ripple Effect was updated on June 1, 2026 and Index Sums on June 24, 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.*