Hitori Pro vs Index Sums
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Hitori Pro
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.
- Multiple difficulty levels
- Light, dark, and coffee layouts
- English and German language support
- Game Center integration
- Portrait and landscape modes
- Pinch-to-zoom functionality
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Solve Hitori (japanese for: "leave me alone") puzzles on your iPad or iPhone! If you like Sudoku, you will love Hitori! ++++++++++++++++++++++++++++++++ completely add-free! ++++++++++++++++++++++++++++++++ Features: 16 puzzles (Hitori): • 8 levels of difficulty each containing 2 puzzles from "Greenhorn" to "Grandmaster" • additional levelpacks available via in app purchase 72 puzzles (Hitori Pro): • 8 levels of difficulty each containing 9 puzzles from "Greenhorn" to "Grandmaster" • additional levelpacks available via in app purchase 3 layouts: • light • dark • coffee 2 languages: • german • english additional Features: • Game Center support • playable in portrait and landscape mode • use "Pinch-to-Zoom" for a better overview compatible devices: • iPhone 5 or newer • iPad • iPad Pro • iMac, MacBook, Mac Mini (requires iOS10.3/macOS10.5 or higher) ++++++++++++++++++++++++++++++++ If you like the app, please leave me a good review! If you have questions, problems or suggestions, please contact me by email to hitori.app@icloud.com. New puzzles are in progress and coming soon!
Index Sums
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.
- Row and column sum logic puzzles
- Multiple difficulty levels
- Daily challenges
- Progress tracking and statistics
- Offline play
- Customizable themes
- Haptic feedback
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Challenge your mind with Index Sums (Kakurasu), an elegant Japanese number logic puzzle that combines the best of Sudoku and Nonograms! HOW TO PLAY: • Fill in the grid based on row and column sums • Use logic to determine which cells should be filled • Complete the puzzle to reveal a hidden pattern • No guessing required - pure logic and deduction! KEY FEATURES: • Multiple difficulty levels (Easy, Medium, Hard) • Daily challenges to keep your mind sharp • Track your progress and statistics • Beautiful, minimalist design • Dark mode support • Offline play capability • Customizable themes and colors • Haptic feedback for better interaction BENEFITS: • Mental Agility: Challenge your logical thinking and problem-solving skills • Focus & Concentration: Practice maintaining focus through engaging puzzles • Pattern Recognition: Develop your ability to spot patterns and make quick decisions • Stress Relief: A relaxing way to unwind while keeping your mind active • Daily Challenge: Build a fun routine with daily puzzles • Progress Tracking: Monitor your improvement over time GAME MODES: • Classic Mode: Solve at your own pace • Daily Puzzles: New challenges every day • Practice Mode: Learn the basics FEATURES: • Intuitive touch controls • Haptic feedback • Progress tracking and statistics • Level progression system • Share your achievements • No ads or interruptions • Regular updates with new features Whether you're a puzzle enthusiast or looking to improve your logical thinking, Index Sums offers the perfect blend of challenge and satisfaction. Download now and join thousands of players in this addictive number logic puzzle!
Screenshots
Verdict
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 (#152 vs unranked) and device support (4 vs 2). On review sentiment, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Hitori Pro | Index Sums |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.0 (5 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 5 — better | 4 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Best chart rank | #152 — better | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 11 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Christian Lueth | ZORIX LLC |
Customer experience
Hitori Pro
Index Sums
In-app purchases
Hitori Pro
- L01: Puzzle Pack 1 (24 puzzle)$0.99
- A01: Greenhorn 1 (20 puzzles)$0.99
- B01: Beginner 1 (20 puzzles)$0.99
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- C01: Advanced 1 (20 puzzles)$0.99
- D01: Amateur 1 (20 puzzles)$0.99
- E01: Professio. 1 (20 puzzles)$0.99
- F01: Expert 1 (20 puzzles)$0.99
- G01: Whiz 1 (20 puzzles)$0.99
- H01: Grandmast. 1 (20 puzzles)$0.99
- X01: Mega Pack 1 (160 puzzles)$1.99
Index Sums
No in-app purchases









