# Hitori Pro vs Index Sums

The clearest difference is price: Index Sums at Free against Hitori Pro's $0.99. Index Sums also leads on rating (5.0 vs 4.0) and in-app purchases (none vs 10). Hitori Pro's advantage is chart position (#148 vs unranked) and device support (4 vs 2). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

Index Sums is free to download; Hitori Pro costs $0.99 up front. Hitori Pro sells 10 one-off in-app purchases. Index Sums asks for nothing beyond the download.

Index Sums holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Hitori Pro ships an update monthly, Index Sums every 3 weeks. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Hitori Pro | Index Sums |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [4.0 (5 ratings)](https://appshunter.io/ios/app/hitori-pro/id1264501421/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/index-sums/id6745894447/reviews)** |
| Number of ratings | **5** | 4 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Best chart rank | **#148** | — |
| Size | 11 MB | 25 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Christian Lueth](https://appshunter.io/developer/1041680819) | [ZORIX LLC](https://appshunter.io/developer/1814371874) |

## What reviewers say

### Hitori Pro

[App page](https://appshunter.io/ios/app/hitori-pro/id1264501421)

**Currently charting:** #148 Top Paid · Trivia (US App Store)

This logic puzzle game offers a unique challenge based on Japanese "leave me alone" rules. It features multiple difficulty levels, layouts, and languages, with additional puzzle packs available for purchase. Enjoy a completely ad-free experience on your Apple devices.

**Highlights:** Multiple difficulty levels, Light, dark, and coffee layouts, English and German language support, Game Center integration, Portrait and landscape modes, Pinch-to-zoom functionality

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| L01: Puzzle Pack 1 (24 puzzle) | $0.99 | one-time |
| A01: Greenhorn 1 (20 puzzles) | $0.99 | one-time |
| B01: Beginner 1 (20 puzzles) | $0.99 | one-time |
| C01: Advanced 1 (20 puzzles) | $0.99 | one-time |
| D01: Amateur 1 (20 puzzles) | $0.99 | one-time |
| E01: Professio. 1 (20 puzzles) | $0.99 | one-time |
| F01: Expert 1 (20 puzzles) | $0.99 | one-time |
| G01: Whiz 1 (20 puzzles) | $0.99 | one-time |
| H01: Grandmast. 1 (20 puzzles) | $0.99 | one-time |
| X01: Mega Pack 1 (160 puzzles) | $1.99 | one-time |


### 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 Hitori Pro free?

Hitori Pro costs $0.99, and also offers in-app purchases.

### Is Index Sums free?

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

### Which has better reviews, Hitori Pro or Index Sums?

Index Sums is rated higher. Hitori Pro averages 4.0 out of 5 from 5 ratings, while Index Sums averages 5.0 from 4 ratings.

### Do Hitori Pro or Index Sums have ads?

Neither Hitori Pro nor Index Sums shows ads.

### Which is updated more often, Hitori Pro or Index Sums?

Hitori Pro ships an update monthly, and Index Sums every 3 weeks. Most recently, Hitori Pro was updated on October 26, 2026 and Index Sums on October 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.*