# NineGaps — user reviews > 109 indexed App Store user reviews of NineGaps by Quadion Technologies LLC, rated 4.10/5 from 11 ratings. - Source: https://appshunter.io/ios/app/ninegaps/id317223443/reviews - App overview in markdown: https://appshunter.io/ios/app/ninegaps/id317223443.md - Rating breakdown: 5★ 7 · 4★ 0 · 3★ 3 · 2★ 0 · 1★ 1 ## What do users think of NineGaps? Overall sentiment: positive **Pros** - 🧠 Excellent brain training and mental math improvement - 🎮 Simple yet challenging gameplay mechanics - 🎨 Clean, polished, and attractive visual design - ⏱️ Quick games perfect for short waiting periods - 👨‍👩‍👧‍👦 Suitable for multiple age groups and skill levels - 🎯 Multiple difficulty levels (easy, medium, hard) - 💰 Great value for the price - 🧩 Unique puzzle concept combining logic and math - 🚀 Smooth and bug-free performance - 😄 Satisfying audio feedback on correct answers **Cons** - 🔊 Loud sound effects that cannot be controlled properly - 💾 No game saving feature when closing app - 🧮 Does not follow proper order of operations (PEMDAS) - 🔴 Occasional crashes or app not opening - 🎮 Limited replay value after extended play - 🔧 Sound settings don't persist between sessions - 👁️ Difficulty distinguishing selected pieces during gameplay - 🚫 Incorrect answer detection (false negatives reported) - 📊 No user account or persistent high score tracking **Commonly reported bugs** - 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 - Unsolvable puzzle generation reported - Incorrect answer validation (marking correct answers as wrong) **Most requested features** - 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 - 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 ## Newest reviews (17 of 109) ### 4/5 — Good time pass *2013-06-03, version 1.4* Small game but a nice time pass...not as tough as a sudoku. ### 4/5 — Good quick fun! *2011-07-08, version 1.2* Great game to pick up and play that doesn't take long and is fun! Keeps your mind working and sharp! ### 4/5 — Good!!!! *2011-06-22, version 1.2* Fun math game. Good for kids! ### 4/5 — NineGaps *2011-06-05, version 1.2* Great brain teaser and easy to use as a short time killing app ### 5/5 — Fantastic Teaching Aid *2010-09-06, version 0* I am a secondary school teacher and this is brilliant for starters for the class. 1 feature that could be added though is a solution button to save me having to work it out as well!! ### 5/5 — Mathstastic *2010-09-05, version 0* I bought this app and then got my 2 kids to get it also as it really makes you think without you realising.It's definitely helped them and me understand better how numbers interact, all while having fun. ### 4/5 — Not too bad *2010-08-24, version 0* It's a good puzzle game great way to waste time ### 4/5 — Unsolvables *2010-08-09, version 0* Great game. I agree with most of the requested enhancements, especially a "show solution" option. I found one game that is unsolveable (have a screen shot if anyone doesn't believe me), so I would be interested for the game to show me the alleged solution. Love the quick mental stimulus. ### 5/5 — Awesome! *2010-07-15, version 0* If you like math, then you should by this game. ### 5/5 — Excellent Math Puzzle Game!!! *2010-06-21, version 0* Puzzle itself is Amazing!!! Design and Interface is Super Cool and Amazing!!! In short this is worth spending $0.99 on this cool Math Puzzle Game. ### 4/5 — Nice Little Game! *2010-06-19, version 0* I really like this game and it's well worth its price. The interface is really unique, with nice use of the touch screen. I would like it even better if it would: 1. Remember the game you're currently playing if you need to leave the app 2. Remember your game settings 3. Allow you to view your game after it's complete 4. Ask if you're sure before resetting high scores ### 5/5 — Great!!!! Such a great way to wake up braincells *2010-05-17, version 0* This is worth every penny ### 4/5 — Great Game!! *2010-05-05, version 0* Gets your brain working. Love this game. ### 5/5 — Simply Addictive *2010-04-18, version 0* Smooth, bug free, and a great way to kill time. ### 5/5 — Great fun and learning *2010-04-05, version 0* Me and my boys both enjoy this challenging game. Great skill builder too. ### 4/5 — Cool game *2010-04-02, version 0* I like this game except when I get stumped I'd like to be able to see the solution ### 5/5 — Fun Mind Game! *2010-03-21, version 0* Fun little app, great for wasting time while waiting in line or in an office. I appreciate it because I hate the mindless time-wasters. This at least challenges me, and by giving us different levels, everyone in my family can use it - even my 7y/o! ## Most critical reviews (10 lowest-rated) ### 1/5 — Very disappointing. *2013-08-08, version 1.4* This app is very disappointing! I bought it in the hope that it would help me to become quicker at mental arithmetic, but this app is wrong! It tells me I'm wrong when I know I am right!! I don't know whether this app is faulty or a scam, but it's definitely not worth the 69p! Doesn't even deserved any stars but I have to put one cause then it won't let me write a review!! ### 1/5 — Did not open!!!:( *2010-09-23, version 0* Bought it today, but it just does not open! ### 2/5 — Way Fun!! *2010-03-15, version 0* Love it!! Challenging and a lot of fun! ### 2/5 — Great & Annoying at the same time *2009-08-07, version 0* 9 Gaps is fun, challenging, and that makes it great. When you have successfully completed a puzzle what sounds like a bunch of 3rd grade kids yell, "YAAYYYY!!!." and there's no way to lower the volume or turn it off. And that makes it Annoying. And because it's annoying I don't play it much anymore. ### 3/5 — Good time killer *2010-04-05, version 0* I play this game while waiting at the dr's office or in line @ the DMV. Really enjoy it for those times when your bored waiting somewhere. ### 3/5 — Fun game *2010-02-04, version 0* Fun ### 3/5 — OK but flawed *2009-08-31, version 0* There is a problem in the mathematical calculation of the game that needs to be fixed. On hard level I was presented with a row which contained [ ] - [ ] x [ ] = 17 which is unsolvable. ### 3/5 — Great Little Game, but... *2009-08-15, version 0* Fun and original, but replay value becomes limited after a while. Still good buy for a buck. ### 3/5 — It's ok *2009-08-05, version 0* It works well and whilst it's quite simplistic fun it's just there's nothing really dragging you back for more - and overall not a huge amount that seperates itself from the other large amount of puzzle games already available. It's not a bad game though it's just your milage mary vary. ### 3/5 — Brain Tester *2009-07-30, version 0* This game revealed my total arithmetical deficiency!Hopefully I am now making some improvement.I love the scrap paper look.Good game for getting the brain cranked up. ## Most praised reviews (10 highest-rated) ### 5/5 — Unmatched simple brilliance *2016-12-26, version 1.5* If you're pretty good at math, this is a game that's beautifully challenging and beautiful to look at as well. Perfection. ### 5/5 — Nine gaps *2012-10-21, version 1.4* Challenging fun. One of my favorites. ### 5/5 — Awesome game! *2012-05-30, version 1.4* Love the new hint button! ### 5/5 — Excellent Game *2011-12-30, version 1.2* Great game ### 5/5 — Super fun *2011-11-12, version 1.2* Great for all ages. My kids can beat me!! Games are quick so fills up waiting times nicely. ### 5/5 — Fun *2011-07-08, version 1.2* Like it ### 5/5 — Helpful *2011-04-12, version 1.2* I'm a GCSE student and since using this app about 4 to 5 times a week I've noticed that my basic maths has improved which saves loads of time when I do homework as I don't have to reach for a calculator to work out something like 7x8 every other question. It is also helpful for younger children on the easier levels but for adults and 13+ year olds if you use expert each time you'll find yourself addicted to this enjoyable little puzzle! ### 5/5 — NineGaps *2011-04-10* Excellent game! ### 5/5 — Susiec *2011-02-22, version 1.2* Good app, works for many age groups. ### 5/5 — Nines *2010-09-22, version 0* I enjoy this game just to play for fun, yet it is a challenge. Thanks for the game. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-08.*