NineGaps vs Booeys
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
NineGaps
This is a challenging puzzle game where you place numbers 1-9 into gaps, matching operations. It offers a unique twist on number puzzles with multiple difficulty levels and endless replayability.
- Unique puzzle gameplay
- Cute graphics
- 5 difficulty levels
- Unlimited puzzles
- Leaderboards and achievements
- GameCenter integration
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Featured by Apple as "Best Math Puzzle Game" and "New and Noteworthy" NineGaps is a highly addictive and tricky puzzle game. The goal of the game is really simple. You have to use your wits to place numbers from 1 to 9 in the missing gaps, while matching the operations presented in the puzzle. It's just like sudoku, but different! FEATURES: • simple and unique puzzle-based gameplay • cute graphics • 5 difficulty levels • unlimited brain burning puzzles • global and friend leaderboards • achievements • GameCenter integration • highly addictive and fun! Fans of Sudoku, KenKen and TwentyFour will feel right at home! Test your puzzle cracking skills with NineGaps today! PRESS REVIEWS: ..."sudoku-style puzzle game featuring a clever twist", Macworld ..."polished, fantastic looking iPhone app that anyone can enjoy", MacYourself ..."there is no reason this great puzzle app shouldn't be downloaded today", AppModo ..."with random boards the replayability is pretty much endless", In Touch Reviews ..."simple game with a simple design and does it simply perfect", GameZebo ..."make way for another highly addictive game coming out for your iPhone", Mobilewhack ..."great for all ages whether you want a math refresher or a fun way to teach kids math skills", The AppPodcast ..."this is a simple looking brain burning challenger", iPhone Footprint ..."sudoku meets calculator, has baby, calls it NineGaps", Mobile Game Faqs ..."highly addictive puzzle game", iPhone Toolbox ..."fun and challenging", AppChatter ..."easy to pick up and hard to put down", iPhone App Reviews CONTACT US - Visit us: ninegapsapp.com - Follow us: twitter.com/quadionTouch - Become a fan: facebook.com/pages/Quadion-Technologies/65161686424 Check out our other exciting games: Rune Trails and Wordweaver
Booeys
Guide lost souls through challenging puzzle realms using helpful ghosts. Solve intricate puzzles with increasing difficulty across diverse dimensions, mastering new tools and strategies. This game also offers insights into real-world career skills.
- 30+ challenging puzzles
- Beautiful, dark visual style
- Master new tools
- Multiple level completion methods
- Real-world skill tips
- Certificate of achievement
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Use little ghosts called Booeys to guide the Lost out of strange realms in this gorgeous puzzle game! Booeys: A Ghost’s Code invites you to solve a series of complex puzzles with ever increasing difficulty. Each level represents a strange dimension with new challenges to face. As the one who controls the Booeys, you hold the key to helping the Lost escape. Engage in funny banter with Booeys between levels, and learn how your work in helping the Lost can launch you on the path to a successful career … With Booeys: A Ghost’s Code, you’ll experience: ● 30+ challenging puzzles to put your skills to the test ● Beautiful environments with a dark and intriguing visual style ● New tools to master and put to use as you progress ● Different ways of completing each level ● Tips for putting in-game skills to use in the real world ● Certificate of achievement for beating higher levels Booeys: A Ghost’s Code was developed with support from Partner 4 Work to demonstrate the link between gaming and future careers in technology. Booeys engages five aptitudes critical to technical careers: Problem Solving, Logic, Attention to Detail, Understanding Algorithms, and the Ability to Conceive and Build a Solution. If you live in southwestern Pennsylvania and want to learn more about ways to get started on a career in IT, fill out the contact form here: www.booeysgame.com Disclaimer: The certificate issued in this game solely recognizes the player’s in-game performance. Privacy Policy: https://www.simcoachgames.com/privacy
Screenshots
Verdict
The clearest difference is monetization model: Booeys at free against NineGaps's paid. Booeys also leads on update cadence (every 9 months vs every 26 months). NineGaps's advantage is review sentiment (88% vs 75%) and iOS requirement (10.3 vs 12.0). On price, rating, ratings volume 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
NineGaps holds the better App Store score, 4.1 against 3.9. Both are backed by a comparable volume of ratings — 11 and 16 respectively. Written reviews point the same way: 88% of NineGaps's written reviews are positive against 75% of Booeys's.
NineGaps ships an update every 26 months, Booeys every 9 months. The most recent releases landed on October 4, 2026 and September 27, 2026 respectively.
| Parameter | NineGaps | Booeys |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (11 ratings) — better | 3.9 (16 ratings) |
| Positive reviews | 88.1% of reviews — better | 75.0% of reviews |
| Number of ratings | 11 | 16 — better |
| Update frequency | Every 26 months | Every 9 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 10.3 — better | 12.0 |
| Further details — not scored | ||
| Size | 72 MB | 222 MB |
| Age rating | 4+ | 9+ |
| Developer | Quadion Technologies LLC | Simcoach Games |
Customer experience
NineGaps
Booeys
Bugs and requests
NineGaps
Reported bugs
7 issues- Sound effects stop working intermittently
- App crashes or fails to open on launch
- Sound volume settings not saving between sessions
- OpenFeint achievements not awarding properly
- Mathematical calculation errors in some puzzles
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- Unsolvable puzzle generation reported
- Incorrect answer validation (marking correct answers as wrong)
Requested features
14 requests- Solution/reveal button to show answers when stuck
- Hint system for difficult puzzles
- Game auto-save functionality
- Persistent sound settings across sessions
- Global leaderboards for competition
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- Multiplayer mode or WiFi challenges
- Larger grids (4x4, 5x5) for increased difficulty
- Puzzle numbering system for tracking progress
- Ability to view completed games
- Confirmation dialog before resetting high scores
- Brackets/parentheses support in equations
- Higher difficulty levels for advanced players
- More game modes and variations
- Improved color contrast for colorblind users
Booeys
Not enough reviews yet to summarise bugs or requests.
In-app purchases
NineGaps
No in-app purchases
Booeys
No in-app purchases









