# Hue9: Color Sudoku — Daily Puzzles & Zen Logic > Color-based Sudoku puzzles for a zen logic experience. (iPhone/iPad app by David Cardena Formoso.) - Source: https://appshunter.io/ios/app/hue9-color-sudoku/id6758043250 (this page in markdown: same URL + `.md`) - Developer: [David Cardena Formoso](https://appshunter.io/developer/1763214301) - Category: Games, Entertainment, Puzzle - Price: $9.99 with in-app purchases - Rating: 4.40/5 from 28 App Store ratings · 12 written reviews indexed - Age rating: 4+ - Requires: iOS 17.6 · 12 MB - Languages: American English, French (France), German (Germany), Japanese, Chinese (Simplified, China), European Spanish - Released: 2026-02-25 - Data updated: 2026-09-02 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/hue9-color-sudoku/id6758043250/reviews.md ## What is Hue9? Meet Hue9, color Sudoku that goes beyond color. Solve classic 9×9 Sudoku with colors instead of numbers. Choose the original Colors only board or pair every hue with a unique symbol for a puzzle that never relies on color alone. ACCESSIBLE BY DESIGN • Colors only or Colors + symbols • VoiceOver descriptions for every cell • Support for Larger Text, Increased Contrast, Dark Mode, Differentiate Without Color, and Reduce Motion • Clear layouts designed for iPhone and iPad PLAY YOUR WAY • Zen Mode removes the timer, score, mistake limit, and pressure • Four difficulty levels, from Easy to Expert • Hints, notes, undo, highlights, and saved games • Themes, alternate icons, and light or dark appearance A NEW PUZZLE EVERY DAY Join the shared Daily Grid, build your streak, and compare your result through Game Center. LEARN AS YOU PLAY Start with the interactive lesson, then explore the visual Sudoku Guide—from the basic rule to advanced solving techniques. Whether you are a Sudoku expert or discovering logic puzzles for the first time, Hue9 offers a calm, tactile, and beautifully focused challenge. ## Key features - Color-based Sudoku puzzles - Sensory logic experience - Minimalist design - Brain sharpening - Zen moments ## Pricing and in-app purchases Base price: $9.99. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Hue9 Pro | $9.99 | one-time | ## Recent user reviews (10 of 12) All indexed reviews: https://appshunter.io/ios/app/hue9-color-sudoku/id6758043250/reviews.md ### 1/5 — Give option of colors only *2026-08-28* Too busy with the shapes, allow colors only mode please or I won’t play this game any longer. **Developer response:** Hi! Colors-only mode is still available. Open Hue9 Settings → Accessibility and turn off Symbol Mode. If symbols remain visible, please also check iPhone Settings → Accessibility → Display & Text Size → Differentiate Without Color, as Hue9 respects that system setting. Sorry for the confusion — we’ll make this option easier to find. ### 5/5 — Fun to play, colors are pleasing *2026-07-17* Made with care. Good game to pass time and train the mind **Developer response:** Thanks so much for your kind review. I’m glad you’re enjoying Hue9 and finding the colors pleasing. It’s great to hear that it’s helping you pass the time and train your mind. ### 4/5 — The app I’ve been looking for! *2026-07-12* I love playing color sudoku, and have been looking for a simplified, beautifully laid out app version for many years. Was seriously thrilled to finally find this one! The design is super clean, pretty, and wonderfully customizable. Absolutely love it. What I don’t love is the competitive-style play, and really wish it could be turned off. I want to play to relax and wind down, not be stressed about my time or losing points over a misclick. I just don’t need to track my points in order to keep wanting to play. I’ve already been playing (other, much less aesthetically pleasing) color sudoku apps for years. Ideally would like options to toggle off the points mode, as well as the option turn off individual features such as the timer, immediate notifications for wrong moves, and losing points for wrong moves or hints. If I’ve made a mistake and get to the end of the puzzle and it’s not a win, I’ll know there’s a mistake. Or, another nice to have feature could be a “check for errors” button. Other small nitpicky annoyances: - the hint button is really easy to hit accidentally. I never want hints anyway, but losing points for hitting it makes its current placement extra stressful. Or maybe don’t move it, but add a confirmation check before giving the hint? - often when I leave the app mid-game, then go back to the app, the app goes back to the home screen and that game is lost. I’ve played other similar apps that never did this, so not sure what the issue is here. (Note, this is just when I move out of the app; I’m not talking about closing the app and trying to go back.) Anyway, overall I’m still so happy this app exists. Thank you!! **Developer response:** Thank you so much for the detailed feedback! I took comments like yours to heart while building version 2.0.0, which is now finished and ready to be released. It includes a new Zen Mode for playing without points, timers, or pressure, plus game resume so you won’t lose your puzzle when leaving the app. I’ve also improved how mistakes and hints work to make the whole experience much more relaxing. Thanks again for helping me make the app better, I hope you’ll love 2.0.0 and maybe improve the rating! ### 4/5 — Review *2026-07-07* I need better instructions I didn’t understand it at first **Developer response:** Thanks for the honest feedback! I completely agreed that the app needed clearer instructions, so I’ve redesigned the onboarding and added a much easier-to-follow introduction in version 2.0.0. The update is already finished and ready to be released. Your feedback genuinely helped me focus on making the app easier to understand from the very first game. I hope you’ll give the new version a try! ### 5/5 — Fun and unique *2026-06-29* Really enjoy this twist on sudoku. Super relaxing. **Developer response:** Thanks for the kind words! I’m so glad you’re enjoying Hue9’s unique twist on Sudoku and finding it relaxing. Your feedback means a lot to me. ### 5/5 — Fun *2026-06-18* Peaceful & enjoyable **Developer response:** Thanks for the lovely review! I’m glad you’re enjoying Hue9. It’s great to hear the puzzles feel peaceful and fun for you. ### 4/5 — Beautiful But Puzzles Repeat *2026-05-16* I love this puzzle! It’s peaceful and the haptics are enjoyable. I do the Daily Grid every morning. But I’ve noticed that the puzzles in the Daily Grid repeat from time to time. It’s very frustrating, because mathematically, we should have endless puzzles. When a puzzle repeats, I sometimes do other things to challenge myself, but it’s always a let down when I notice I got a repeat for that day. **Developer response:** Thank you so much for the thoughtful feedback, and for making Daily Grid part of your morning routine. You were absolutely right: the Daily Grid puzzles were repeating more often than they should. I’ve now replaced the old generation system with a much stronger one, so each day now gets a fresh shared puzzle and repeats should no longer happen. Really appreciate you pointing this out. It helped make Hue9 better. ### 5/5 — simple and fun *2026-05-14* I really love sudoku and this is so minimal and nice it’s quite relaxing to play! **Developer response:** Thank you for your review. I’m so glad you’re enjoying Hue9: Color Sudoku—minimal, simple, and relaxing is exactly what I aimed for. If you have any suggestions or ideas, I’d love to hear them. ### 5/5 — Challenging Sudoku game *2026-04-23* Very fun to play sudoku with color! **Developer response:** Thanks for your review! I’m glad you’re enjoying Hue9. I love that you find it challenging and still friendly, simple, and fun to play. Color adds a new twist, and I’m happy it’s bringing you enjoyment. If you have any ideas for making the experience even better, I’d love to hear them. ### 5/5 — Muy buen Juego *2026-03-29* La agilidad mental es necesaria para la vida, y este juego te permite ejercitarla. **Developer response:** ¡Muchas gracias por tu comentario! Me alegra saber que disfrutas Hue9: Color Sudoku. Estoy de acuerdo contigo: ayuda a ejercitar la agilidad mental y a mantener el cerebro activo. Gracias por jugar y por valorar el impacto del juego. ## Frequently asked questions about Hue9 ### What is Hue9? Hue9 is a mobile game that reimagines the classic 9x9 Sudoku puzzle by using a vibrant palette of colors instead of numbers. It's designed to be a sensory logic experience that sharpens your brain and offers a moment of Zen. ### How does Hue9 differ from traditional Sudoku? The primary difference is the use of colors instead of numbers. This provides a fresh visual approach to the familiar logic challenges of Sudoku, focusing on pure logic and visual harmony. ### Is Hue9 suitable for beginners? Yes, Hue9 is designed for both Sudoku masters and casual puzzle lovers. Its minimalist challenge focuses on pure logic, making it accessible to new players while still engaging for experienced ones. ### Does Hue9 have ads? No, Hue9 is ad-free, allowing for an uninterrupted and immersive puzzle-solving experience. ### What devices support Hue9? Hue9 is available on iPhone and iPad devices, offering a consistent experience across Apple's mobile platforms. ### What is the age rating for Hue9? Hue9 has an age rating of 4+, making it suitable for a wide range of players. ### How often is Hue9 updated? The latest version, 1.1.4, was released on March 23, 2026, indicating recent development activity. Updates typically aim to improve gameplay and add new content. ### What is the user rating for Hue9? Hue9 has a rating of 3.7 stars based on 7 ratings. This feedback helps the developer understand user sentiment and areas for improvement. ## Version history (last 5 releases) ### 2.0.2 — 2026-08-30 Hue9 2.0.2 makes Board Appearance clearer. • Choose Colors only or Colors + symbols with a new control in Settings and during a game. • Hue9 now explains when the iOS Differentiate Without Color setting requires symbols. • Additional performance improvements and refinements across the app. Thanks for playing Hue9. ### 2.0.1 — 2026-08-27 Hue9 2.0 is our biggest update yet — rebuilt to make color Sudoku calmer, clearer, and more accessible. ACCESSIBILITY THROUGHOUT HUE9 • VoiceOver now describes every cell’s row, column, value, notes, and state. • Improved support for Larger Text, Increased Contrast, Dark Mode, Differentiate Without Color, and Reduce Motion. • Clearer visual feedback and refined layouts across iPhone and iPad. COLOR ACCESSIBILITY • The new Symbol Mode pairs each of Hue9’s nine colours with a distinct geometric shape. • Keep the personality of color without relying on color alone — designed to make the board easier to read for players with color vision differences. • Choose Colours or Colours + Symbols during onboarding, or change it anytime in Settings. • A new symbol-first alternate app icon carries the same visual language beyond the board. LEARN SUDOKU WHILE YOU PLAY • A redesigned onboarding and interactive first-game lesson. • A new visual Sudoku Guide covering everything from the core rule and candidates to advanced techniques. PLAY YOUR WAY • Zen Mode removes points, mistake limits, and immediate error feedback. • Pause and resume games with their original settings preserved. • Refined Daily Grid, reminders, Game Center behaviour, iPad layouts, persistence, and stability. Thank you for playing Hue9. ### 2.0.0 — 2026-08-27 Hue9 2.0 is our biggest update yet — rebuilt to make color Sudoku calmer, clearer, and more accessible. ACCESSIBILITY THROUGHOUT HUE9 • VoiceOver now describes every cell’s row, column, value, notes, and state. • Improved support for Larger Text, Increased Contrast, Dark Mode, Differentiate Without Color, and Reduce Motion. • Clearer visual feedback and refined layouts across iPhone and iPad. COLOR ACCESSIBILITY • The new Symbol Mode pairs each of Hue9’s nine colours with a distinct geometric shape. • Keep the personality of color without relying on color alone — designed to make the board easier to read for players with color vision differences. • Choose Colours or Colours + Symbols during onboarding, or change it anytime in Settings. • A new symbol-first alternate app icon carries the same visual language beyond the board. LEARN SUDOKU WHILE YOU PLAY • A redesigned onboarding and interactive first-game lesson. • A new visual Sudoku Guide covering everything from the core rule and candidates to advanced techniques. PLAY YOUR WAY • Zen Mode removes points, mistake limits, and immediate error feedback. • Pause and resume games with their original settings preserved. • Refined Daily Grid, reminders, Game Center behaviour, iPad layouts, persistence, and stability. Thank you for playing Hue9. ### 1.1.5 — 2026-04-06 - Improved the experience after completing a puzzle. - Expanded localization support across all supported languages. - Made a few flow and reliability improvements. - Small polish and bug fixes. ### 1.1.4 — 2026-03-23 - Light, Dark, and System appearance modes are now available to all players. - Improved PRO gating across Settings for a clearer upgrade flow. - Fixed appearance mode applying only to Settings instead of the full app. - Small UI polish and bug fixes. ## More apps by David Cardena Formoso - [Thoth Ai-art generator deity](https://appshunter.io/ios/app/thoth-ai-art-generator-deity/id6444231659) All apps by David Cardena Formoso: https://appshunter.io/developer/1763214301 ## Related topics [color sudoku](https://appshunter.io/ios/topics/color-sudoku) · [sudoku colors](https://appshunter.io/ios/topics/sudoku-colors) --- *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 2026-09-02.*