# OCTO Logic Puzzle — Your Next Favorite Puzzle > Addictive logic puzzle game with number placement and summation challenges. (iPhone/iPad app by Doug Gardner.) - Source: https://appshunter.io/ios/app/octo-logic-puzzle/id1508794281 (this page in markdown: same URL + `.md`) - Developer: [Doug Gardner](https://appshunter.io/developer/508643439) - Category: Games, Education, Family, Puzzle - Price: Free with in-app purchases - Rating: 4.93/5 from 29 App Store ratings · 6 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 50 MB - Languages: English - Released: 2020-09-29 - Data updated: 2026-06-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/octo-logic-puzzle/id1508794281/reviews.md ## What is OCTO Logic Puzzle? OCTO is a highly addictive logic puzzle, enjoyed by puzzle enthusiasts the world over.    The rules are simple: numbers cannot repeat in octagons, rows, columns and diagonals, and they have to add up to the provided diamond and diagonal sums. Puzzle difficulties range from youngster-friendly to brutally challenging, as you master dozens of techniques that combine position logic and good old-fashioned math.   OCTO puzzle books have sold thousands of copies, the puzzle has appeared in dozens of university newspapers and the OCTO has been featured in local and international puzzle competitions. If you are ready for a new logic puzzle challenge, then OCTO is for you. App Features: - 160 starter puzzles, including all difficulty levels - Extensive instructions, including tips and solving techniques - Work any number of puzzles at the same time! Your progress will be stored for each puzzle and will be available whenever you want to continue - Replay feature allows sharing and "competitive puzzling" - Check puzzle and Undo/Redo features - Notes feature allows you to "pencil in" possible solutions - Choose from a collection of artistic puzzle board designs ## Key features - Number placement rules - Summation challenges - Multiple difficulty levels - Save progress on multiple puzzles - Tips and solving techniques - Notes and undo/redo features - Artistic puzzle board designs ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Ad-free Bundle | $2.99 | one-time | | Mega OCTO Pack | $3.99 | one-time | ## Recent user reviews (6 of 6) All indexed reviews: https://appshunter.io/ios/app/octo-logic-puzzle/id1508794281/reviews.md ### 5/5 — Love this game *2021-08-21* Originally bought the paperback book at a farmers market. Then played online until it was not kept updated. So glad to have it back! ### 5/5 — Neat *2020-10-05* Visually takes some getting used to, but a neat concept and a smooth app. ### 5/5 — Better Than Sudoku *2020-10-04* These OCTO Puzzles certainly have a learning curve right off the bat. But once you get the hang of it, they end up being a blast. Personally I like these more than sudoku. I think they are more engaging and challenging. But the easier level puzzles make for quick puzzle fun. I highly recommend this to anybody who enjoys puzzles like sudoku. You might find you’ll end up feeling like me in liking the OCTO more. ### 5/5 — Great game for Sudoku lovers *2020-10-02* The next logical step for puzzle lovers who have played too much Sudoku and are looking for their next challenge! Fun to play and more challenging as the levels bump up. ### 5/5 — worth the wait *2020-10-02* I’m so happy there’s an app now! I started doing the Octo in my college paper and ordered the books after I graduated. Thank you for keeping this great puzzle fresh and accessible! ### 5/5 — Better than sudoku *2020-10-02* OCTO! The complexity makes all the difference. Great interface, easy to use, and quite addictive. Thanks for making this game into an app. ## Frequently asked questions about OCTO Logic Puzzle ### What is OCTO Logic Puzzle? OCTO Logic Puzzle is a highly addictive logic puzzle game where players must arrange numbers in octagons, rows, columns, and diagonals without repetition, while ensuring they sum up to provided totals. It offers a range of difficulties from easy to challenging. ### How many puzzles are included in OCTO Logic Puzzle? The app comes with 160 starter puzzles, covering all difficulty levels from youngster-friendly to brutally challenging. This provides a substantial amount of content for players to enjoy. ### Can I work on multiple puzzles at once in OCTO Logic Puzzle? Yes, you can work on any number of puzzles simultaneously. Your progress for each puzzle is automatically saved, allowing you to return and continue whenever you wish. ### Does OCTO Logic Puzzle have any in-app purchases? Yes, OCTO Logic Puzzle has in-app purchases. While the game itself is free to download and play, there may be optional purchases available within the app. ### What devices is OCTO Logic Puzzle compatible with? OCTO Logic Puzzle is designed for Apple devices, including iPhone, iPad, and iPod. It is optimized for these platforms to provide a smooth gaming experience. ### How often is OCTO Logic Puzzle updated? The app was last updated on December 28, 2020, to version 1.2. While specific update frequency isn't detailed, this indicates it has received updates since its release on September 29, 2020. ### What is the age rating for OCTO Logic Puzzle? OCTO Logic Puzzle has an age rating of 4+. This suggests it is suitable for children and adults alike, with its logic and math-based gameplay. ### Does OCTO Logic Puzzle have ads? No, OCTO Logic Puzzle does not contain advertisements. This allows for an uninterrupted puzzle-solving experience. ## Version history (last 3 releases) ### 1.2 — 2020-12-28 Fixes to in-app purchase logic. ### 1.1 — 2020-12-08 Added functionality for in-app purchase of additional puzzles and ad removal. ### 1.0 — 2020-09-29 No release notes. --- *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 2026-06-10.*