Comparison

NineGaps vs Math Crossword

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Unique puzzle gameplay
  • Cute graphics
  • 5 difficulty levels
  • Unlimited puzzles
  • Leaderboards and achievements
  • GameCenter integration
Features
Read full description

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

About

Math Crossword

A number-matching puzzle game where players combine numbers to achieve a zero result. It offers multiple game modes for varied challenges and is suitable for players aged 4 and up.

Highlights
  • Number matching gameplay
  • Achieve zero result
  • Multiple game modes
  • Challenging levels
  • Suitable for all ages
Features
Read full description

Download the best math puzzle on the Appstore. The gameplay is simple: join the numbers to get 0 as result. Zerominator is a challenging number puzzle where your goal is simple: combine numbers until the result reaches exactly 0. Sounds easy? Try the harder levels. Think ahead, find the right combinations, and solve each puzzle using as few moves as possible. Multiple Game Modes Choose the challenge that fits your mood: • Easy • Normal • Hard • Shortest • Longest • Clear All • Time • Use All • Random From quick brain-teasing rounds to difficult number challenges, Zerominator gives you plenty of ways to test your logic and number skills. Can you reach zero?

Screenshots

NineGaps4 screens
Math Crossword4 screens

Verdict

The call

The clearest difference is rating: Math Crossword at 5.0 against NineGaps's 4.0. Math Crossword also leads on update cadence (every 3 months vs every 26 months). NineGaps's advantage is in-app purchases (none vs 6) and ratings volume (10 vs 3). On price, review sentiment, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Math Crossword sells 6 one-off in-app purchases. NineGaps asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Math Crossword holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 10 and 3 respectively. Written reviews point the same way: 88% of NineGaps's written reviews are positive against 91% of Math Crossword's.

UpkeepUpdate frequency

NineGaps ships an update every 26 months, Math Crossword every 3 months. The most recent releases landed on October 31, 2026 and November 2, 2026 respectively.

Scorecard6 real differences · 4 level
NineGaps versus Math Crossword: the parameters behind the verdict, then further details
ParameterNineGapsMath Crossword
PriceFreeFree
Rating4.0 (10 ratings)5.0 (3 ratings) — better
Positive reviews88.1% of reviews90.9% of reviews — better
Number of ratings10 — better3
Update frequencyEvery 26 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS10.3 — better16.6
Further details — not scored
Size72 MB5 MB
Age rating4+4+
DeveloperQuadion Technologies LLCBrotherSoft

Customer experience

NineGaps

All ratings11 ratings
Positive63.6%
Neutral27.3%
Negative9.1%
Written reviews109 reviews
Positive88.1%
Neutral8.3%
Negative3.7%

Math Crossword

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive90.9%
Neutral0.0%
Negative9.1%

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
Show 2 more
  • 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
Show 9 more
  • 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

Math Crossword

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

NineGaps

No in-app purchases

6 purchases

Math Crossword

One-time6
  • 3 Hints$0.99
  • Remove Ads$0.99
  • 10 Hints$1.99
Show 3 more
  • 50 Hints$6.99
  • 100 Hints$8.99
  • 1000 Hints$29.99

Questions

Is NineGaps free?
NineGaps is free to download, with no in-app purchases.
Is Math Crossword free?
Math Crossword is free to download, with in-app purchases available.
Which has better reviews, NineGaps or Math Crossword?
Math Crossword is rated higher. NineGaps averages 4.0 out of 5 from 10 ratings, while Math Crossword averages 5.0 from 3 ratings.
Do NineGaps or Math Crossword have ads?
Neither NineGaps nor Math Crossword shows ads.
Which is updated more often, NineGaps or Math Crossword?
NineGaps ships an update every 26 months, and Math Crossword every 3 months. Most recently, NineGaps was updated on October 31, 2026 and Math Crossword on November 2, 2026.

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