NineGaps vs Sequence
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
Sequence
Test your memory by tapping numbered tiles in the correct order. Choose from various difficulty levels, grid sizes, and game modes to challenge yourself. See how long you can last in the infinite mode.
- Memorize numbered tile sequences
- Tap tiles in correct order
- Multiple difficulty levels
- Variable grid sizes
- Sequential number mode
- Non-sequential number mode
- Multiples of 2 mode
- Infinite mode
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Sequence is a memory game where you memorize a numbered sequence of tiles, and then tap the correct tiles in the correct order to complete the board. Multiple difficulty levels, grid sizes, and game modes give all players something to challenge them. Unlock infinite mode to see how long you can last! Game modes include: * Sequential numbers (ex: 1, 2, 3, 4, 5) * Non-Sequential numbers (ex: 3, 7, 12, 13, 16) * Multiples of 2 (ex: 2, 4, 6, 8, 10)
Screenshots
Verdict
The clearest difference is rating: Sequence at 5.0 against NineGaps's 4.1. Sequence also leads on update cadence (every 3 months vs every 26 months). NineGaps's advantage is in-app purchases (none vs 2) and iOS requirement (10.3 vs 17.6). On price, ratings volume, 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
Both are free to download. Sequence sells 2 one-off in-app purchases. NineGaps asks for nothing beyond the download.
Sequence holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 11 and 4 respectively.
NineGaps ships an update every 26 months, Sequence every 3 months. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.
| Parameter | NineGaps | Sequence |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (11 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 88.1% of reviews | — |
| Number of ratings | 11 — better | 4 |
| Update frequency | Every 26 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 10.3 — better | 17.6 |
| Further details — not scored | ||
| Size | 72 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Quadion Technologies LLC | Dustin Wiens |
Customer experience
NineGaps
Sequence
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
Sequence
Not enough reviews yet to summarise bugs or requests.
In-app purchases
NineGaps
No in-app purchases
Sequence
- Non-Consecutive Game$0.99
- Multiples of 2$0.99
