# 0h h1 — user reviews > 74 indexed App Store user reviews of 0h h1 by Q42 B.V., rated 4.70/5 from 299 ratings. - Source: https://appshunter.io/ios/app/0h-h1/id936504196/reviews - App overview in markdown: https://appshunter.io/ios/app/0h-h1/id936504196.md - Rating breakdown: 5★ 249 · 4★ 35 · 3★ 7 · 2★ 2 · 1★ 6 ## What do users think of 0h h1? Overall sentiment: positive **Pros** - ✨ No ads or in-app purchases - 🧠 Challenging yet simple gameplay - 💡 Helpful hints provided - 🧠 Great for focus and ADHD - 👍 Long-term player satisfaction - 💯 Minimalist and appealing design - 🚀 Smooth gameplay - 💡 Unique and genius concept - 😌 Relaxing and decompressing - 🆓 Free to play - 💡 Supports audiobooks well - 💡 Low storage usage - 💡 Visually appealing - 💡 No required sound components - 💡 No reading required - 💡 Can be paused and resumed - 💡 No time component - 💡 Ideal for college lectures - 💡 Recommended for ADHD clients - 💡 Addictive without being time-consuming - 💡 No guessing involved - 💡 Never frustrating - 💡 Minimalist design - 💡 Logical brain-picking - 💡 Simple yet deep gameplay - 💡 Elegant and entertaining - 💡 Quick and fun bursts - 💡 Easy to learn - 💡 Tricky to master - 💡 Great for short breaks - 💡 Deceptively simple - 💡 No gamification elements - 💡 Great logic puzzle - 💡 No gimmicks - 💡 Good for spare moments - 💡 Beautiful aesthetics - 💡 Well-built code **Cons** - ⚠️ Clipboard access prompt - 🐛 Progress sometimes lost on closing app - 🐛 Leaderboard scores appear impossible (negative times) - 🐛 Hints sometimes incorrect or unhelpful - 🐛 Start game over option missing - 🐛 Highlight and erase incorrect cells missing - 🐛 Start time too long for quick play - 🐛 Error display not reliable after update - 🐛 Difficulty can become too easy over time - 🐛 No sound effects - 🐛 No background soundtrack - 🐛 No iCloud syncing for scores - 🐛 No leaderboards - 🐛 No timers - 🐛 No penalty for hints - 🐛 Difficulty could be increased - 🐛 No paid version for support - 🐛 No new levels - 🐛 Some find it too easy/mechanical - 🐛 Needs iPad for larger grids (big fingers) **Commonly reported bugs** - Progress forfeited when closing app - Randomly asks permission to paste from clipboard - Leaderboard scores with negative times - Hints sometimes incorrect or unhelpful - Error display not reliable after update - Occasional crashes (implied by 'buggy') **Most requested features** - Continue game progress after closing app - In-game stats (games played, best times, scores) - Option to start game over - Option to highlight and erase incorrect cells - Customizable color palettes - iCloud syncing of scores - More difficulty settings or games - Timed version for scoring - Holiday themes - Sound effects for clicks - Background soundtrack - Bigger maps/grids (e.g., 12x12) - Integration with Game Center ## Newest reviews (13 of 74) ### 5/5 — Fun little game *2021-11-09, version 1.3.5* It’s like visual sudoku ### 5/5 — THE BEST *2021-08-12, version 1.3.5* My all-time favorite phone game. I use it to decompress and have been playing it for maybe five years now. Scoring is based on how much you play so I’m pretty up there on the global scoreboards! Thanks for creating such a fun game! ### 5/5 — Truly amazing *2021-07-20, version 1.3.5* I’ve been playing this game for years — always a pleasure to rediscover it on my Home Screen. I love the challenge and relaxation. I will say — I’m high up on several leaderboards and being beat out by those with negative times. Not sure how they managed that. I’d love for those scores to be blocked from the leaderboards as it’s physically impossible to do something in a negative amount of time. ### 5/5 — Best mobile game ever *2021-06-09, version 1.3.5* I’ve played this game for over a year now, and I absolutely love it. While I can’t play it for hours by itself, when I play it with an audiobook I can do that for hours. Other mobile games don’t work that well with audiobooks, because game audio or ads can smother the book. This game has neither! Definitely worth a dollar. - Yay ### 5/5 — the best game *2020-03-24, version 1.3.5* this is my go to game. i’ve played every day for a while now!! easy to pick up, but still a brain scratcher 100s of puzzles in. 10/10 it would be cool to have an IAP that allowed for custom palettes ### 5/5 — Amazing *2016-11-13, version 1.3.4* I was introduced to this game by a friend - she kept playing and I wanted to see what it was all about. I quickly became addicted. ### 5/5 — Ein einfaches und doch sehr schönes Spiel *2016-10-29, version 1.3.4* Es hat gerade mal 3 Regeln und macht doch immer wieder Spaß. Nach der Arbeit/Schule hilft es mir wirklich den Kopf auszustellen und einfach wieder abzuschalten. ### 5/5 — My favorite puzzle game *2016-03-01, version 1.3.4* I have never made a review for a game but this game is honestly so great. There are no ads first off , which is amazing. Everything is free. I love the concept and how simple yet difficult the game is . I reallly wish there were more levels though because the hardest level is now too easy for me due to how much i play . But all in all my favorite game ever! ### 5/5 — Fab *2015-12-06, version 1.3.4* A nice simple puzzle game. ### 5/5 — Macht immer wieder Spaß *2015-10-01, version 1.3.4* Tolles Spiel, einfache Regeln, macht immer wieder Spaß. Danke für 12er Brett, ist mir 99 Cent wert. Bitte Startzeit verkürzen (für Zwischendurch-Spiel eindeutig zu lang) und Fehleranzeige überprüfen, ist seit Update nicht mehr zuverlässig! ### 5/5 — Great game *2015-08-14, version 1.2.1* Gg ### 5/5 — Favorite game *2015-03-15, version 1.2.1* I love this. So unique and genius ### 5/5 — A good distraction *2015-02-28, version 1.2.1* A fun, quick-ish game that makes you think a bit. Thanks guys! ## Most critical reviews (10 lowest-rated) ### 1/5 — Security *2024-04-25, version 1.3.5* It prompted me to allow paste or not from my laptop. No thank you . ### 1/5 — Beware: Spyware *2023-07-02, version 1.3.5* tries to read clipboard - what for? ### 1/5 — A little creepy *2022-11-11, version 1.3.5* When I launch this app, I’ll get a message that it’s trying to paste from my clipboard. What’s up with that? Password / credit card harvesting? ### 1/5 — Warning! Reads Your Clipboard *2022-10-25, version 1.3.5* There’s absolutely no reason for this app to read clipboard data without any explicit action by user. This is nefarious. Uninstalled. ### 1/5 — Awful game *2019-02-26, version 1.3.5* Because this developer made such an awful game based on logic and numerical operations, my friends and I were forced to make a C++ program for a class in college. Thanks for making such a trashy game! ### 1/5 — Terrible *2015-02-16, version 1.1.0* Too buggy 4 you ### 2/5 — Trop facile *2014-11-28, version 1.1.0* Amusant, mais une fois le principe compris c'est très très mécanique. ### 4/5 — Cute and fun *2023-08-05, version 1.3.5* I had a longer review written and when I switched screens it all got lost. So to recap: love the game, love the app, super simple and cute yet fun and challenging. Love that there are no ads and hope it stays that way. Love the optional $0.99 to support it and honestly I would pay more than that! Okay now to the good stuff. This is what I’d like to see in future versions: 1) Continue game. When I close the app, my progress is forfeited and when I go back into it I need to start a new game. While not a dealbreaker, I’d like the option to continue the game I was playing before. 2) Stats. While there is the leaderboard and Game Center stuff, I’m really only interested in playing against myself and seeing my progress. In the settings I’d like to see my stats like how many games I’ve played of each level and the corresponding best times and scores. 3) Tweaking the hints. While the hints are helpful, I have found a couple games where I think I’ve finished and the hints tell me a certain row or column is incorrect but I have yet to be able to figure out a way to find and then fix the error(s) and finish the game. The only option seemed to be to hit the back button until the beginning of the game and start over. (Maybe a start game over option would be good as well!) I’d probably like to be given the option to start over or highlight and erase the incorrect cells so I can finish the game. That’s all I have for now. Thank you!! ### 4/5 — Fun game! *2014-11-26, version 1.1.0* Very elegant and entertaining game. It's fairly easy once you learn a few tricks, though. Might be good to have some more challenging settings, e.g. reducing the number of free tiles. ### 5/5 — Simple and Fun *2025-12-29, version 1.3.5* Honestly my primary praise is that there are no ads, in app purchases, energy, or anything like that. It’s just a simple puzzle game but it’s still challenging at the same time ## Most praised reviews (9 highest-rated) ### 5/5 — super fun and challenging *2025-08-16, version 1.3.5* I love that it gives you hints when you get stuck. Easy to learn yet challenging to master. Great little brain tickler and alternative to mindless scrolling. ### 5/5 — Try it *2025-04-30, version 1.3.5* So satisfying, had this game for many years now. Love it ### 5/5 — Great game! *2024-12-28, version 1.3.5* I am totally hooked to this app! Focusing is hard for me and this helps me a lot! ### 5/5 — Objetivo e direto *2024-09-22, version 1.3.5* Amo ### 5/5 — Simple & Clever *2024-07-28, version 1.3.5* Awesome ### 5/5 — Great game *2024-07-25, version 1.3.5* Awesome game, super fun and challenging. For anyone complaining about the paste from clipboard feature. The game hasn’t been updated in a while and when Apple introduced that feature it hasn’t been removed from this game. If you don’t actively have something in your clipboard it won’t ask. Also if it does ask you say no and it won’t actually read that data. ### 5/5 — Favorite Phone Game *2024-01-25, version 1.3.5* As others have said, this game does wonders for ADHD. Its also the only game that I consistently play for years when others I usually get bored of really quickly. Only thing that even remotely bothers me about it is that it likes to randomly ask permission to paste things when I go from one app to this one? Like, it randomly pops up the “Allow paste” thing for some reason ### 5/5 — ADHD focus aid *2023-11-30, version 1.3.5* This game has served as an ideal aid for me to pay better attention to college lectures. It has no required auditory components and requires no reading, while providing a sufficiently challenging puzzle ti prevent my mind from wandering while not being so complicated I ignore the lecture I am listening to. It has no necessary time component, so the game can be paused and resumed at any time, allowing me to take notes as necessary or otherwise engage in class as needed. Both games in the series have been incredibly helpful, and are fun in their own right. I'm thankful to the devs for creating and maintaining these titles. Now working as a professional counselor, I recommend these games to my ADHD clients who are under-stimulated in lecture settings ### 5/5 — A hidden gem. *2022-07-22, version 1.3.5* This game is so fun yet so simplistic. The storage optimization is phenomenal and gameplay-wise, this is really smooth! The gameplay is really fun with 5 different sizes of grids. The 3 given rules are easily memorizable and enough to solve the puzzle, and you feel very good when you solve a large grid. With not even 5 megabytes, basically anyone can get this game. The storage is very low and a good game for people with near full storage. This game is very visually appealing as well. The designs are simple, sleek and easy to see what’s going on. The color schemes go really well together and overall are very nice. I’d have to give this a solid 10/10. Simple yet nice colors, great storage optimization and solid gameplay. If your into puzzle games, I would strongly suggest this app. Great job, developers! --- *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 2026-07-06.*