# ONO: Think Straight — Bedrock Logic BrainGym Puzzles > Logic puzzle game to clear 'O's from the screen, improving focus and memory. (iPhone/iPad app by Real Maxwell LLC.) - Source: https://appshunter.io/ios/app/ono-think-straight/id1533608908 (this page in markdown: same URL + `.md`) - Developer: [Real Maxwell LLC](https://appshunter.io/developer/1296946363) - Category: Games, Health & Fitness, Casual, Puzzle - Price: Free with in-app purchases - Rating: 5.00/5 from 9 App Store ratings · 6 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 95 MB - Languages: English - Released: 2021-09-23 - Data updated: 2026-06-21 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/ono-think-straight/id1533608908/reviews.md ## What is ONO? Fun! Fast! Free! Unique Bedrock Logic Brain Game! Start a chain reaction that will clear all the O's from the screen -> ONO (no O's). A new type of hybrid casual puzzle game. An overlapping maze. Like Sudoku without numbers. Wordle without letters. Starting with the simplest forms + rules, complexity and variety emerge as elements are added in larger puzzles. A fun easy way to work on your clarity, focus and working memory. 24 levels from very easy to very hard. Master each level by solving 4 puzzles - you are allowed three tries in each of the first two, two tries in the next and, finally, you must solve one puzzle in a single try. The level is then open for free play with three tries forever.  Skippable interstitial ads after every other level. You can to watch a :30 reward ad to unlock a level or get additional stickers Larger levels have 1000's of puzzle variations making ONO a game you can play over & over. *Hat tip to "A Thousand Brains" by Jeff Hawkins for game inspiration, you should buy this book. ## Key features - Unique logic puzzle mechanics - Chain reaction gameplay - Hybrid casual puzzle experience - Improves clarity and focus - 24 levels with increasing difficulty - Free play mode - Thousands of puzzle variations ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove Ads in ONO | $0.99 | one-time | ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/ono-think-straight/id1533608908/reviews.md ### 5/5 — Thinking can be tough!!! *2023-12-24* The first time I played this I was hooked. The first time I ever got a one shot cleanup I was on top of the world, ma! Some of these look so simple until you’re left with 3 or 4 hanging. Good luck! ### 5/5 — Fun, addictive *2021-10-17* Lots of fun - takes a bit to figure out some of the levels (which I enjoy) but there is a “style” (if you will) that ultimately you will notice/see after 20-30 minutes. Perfect for those of us who want to just quickly go deep into a fun puzzle based game. ### 5/5 — O N O *2021-09-24* Great brain fog game. I play it for a few minutes in the morning to crank my ADHD brain up for work. ### 5/5 — Mind challenging *2021-09-24* Great game. Keeps the ole mind working. ### 5/5 — Awesome game! *2021-09-24* So much fun! Easy to get started and segue to more challenging levels. Great for kids. ### 5/5 — Addicting! *2021-09-24* So much fun and rewarding to advance from puzzle to puzzle. Download it now! ## Frequently asked questions about ONO ### What is ONO: Think Straight? ONO: Think Straight is a unique logic puzzle game where players start a chain reaction to clear all 'O's from the screen. It's described as a hybrid casual puzzle game that helps improve clarity, focus, and working memory. ### How many levels are in ONO: Think Straight? ONO: Think Straight features 24 levels, ranging from very easy to very hard. After mastering each level's challenges, it unlocks for free play with three tries. ### Does ONO: Think Straight have ads? Yes, ONO: Think Straight contains advertisements. Skippable interstitial ads appear after every other level, and users can watch reward ads to unlock levels or get stickers. ### Can I play ONO: Think Straight offline? The provided description does not specify if ONO: Think Straight can be played offline. However, typical puzzle games of this nature often function without an internet connection. ### What is the age rating for ONO: Think Straight? ONO: Think Straight has an age rating of 4+. It is designed to be accessible for a wide range of players looking for a cognitive challenge. ### How often is ONO: Think Straight updated? The latest version of ONO: Think Straight is 2026.01.16, with the last update on 2026-02-02. This indicates frequent updates, ensuring ongoing development and improvements. ### What devices support ONO: Think Straight? ONO: Think Straight is supported on iPhone, iPad, and iPod devices, making it widely accessible to Apple users. ### What makes ONO: Think Straight different from other puzzle games? ONO: Think Straight offers a unique 'chain reaction' mechanic to clear 'O's, distinguishing it from number-based or word-based puzzles. Its hybrid casual design and focus on cognitive skills provide a distinct gameplay experience. ## Version history (last 5 releases) ### 2026.04.20 — 2026-06-10 More puzzles between ads. Less ads. More fun. Added exit to menu button in puzzles. Fixed embarrassingly overlooked errors. ### 2026.03.17 — 2026-03-30 Less ads - more fun.  Once a level is mastered, play that level ad free forever! Larger levels have thousands of puzzles! ### 2026.01.16 — 2026-02-02 Less ads - more fun.  Once a level is mastered, play unique puzzles ad free.  Larger levels have thousands of puzzles randomly served forever! ### 2026.01.03 — 2026-01-06 Added exit-to-menu button in every puzzle. Added delay in ads after unlock reward ad. ### 2026.01.02 — 2026-01-05 Added exit-to-menu button in every puzzle. Added delay in ads after unlock reward ad. ## Apps similar to ONO | App | Rating | Price | Category | | --- | --- | --- | --- | | [Catch Me Tap to Win](https://appshunter.io/ios/app/catch-me-tap-to-win/id6737713838) | — | Free | Games | | [Fit The Square](https://appshunter.io/ios/app/fit-the-square/id6499185618) | 5.0 (1) | Free | Games | | [Mind Tiles](https://appshunter.io/ios/app/mind-tiles/id6450654455) | 5.0 (6) | Free | Games | | [Give and Take Game](https://appshunter.io/ios/app/give-and-take-game/id1616017545) | — | Free | Games | | [Reaction Speed - Are you fast?](https://appshunter.io/ios/app/reaction-speed-are-you-fast/id6479173563) | 5.0 (2) | $1.99 | Games | | [Mine Escape!](https://appshunter.io/ios/app/mine-escape/id998671756) | 5.0 (1) | Free | Games | ## Related topics [pattern recognition](https://appshunter.io/ios/topics/pattern-recognition) --- *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 2026-06-21.*