# Dual N-back — user reviews > 123 indexed App Store user reviews of Dual N by Jens Grud, rated 4.70/5 from 1,124 ratings. - Source: https://appshunter.io/ios/app/dual-n-back/id1375327852/reviews - App overview in markdown: https://appshunter.io/ios/app/dual-n-back/id1375327852.md - Rating breakdown: 5★ 951 · 4★ 96 · 3★ 27 · 2★ 10 · 1★ 40 ## What do users think of Dual N? Overall sentiment: neutral **Pros** - 🚀 Effective memory training - 👍 Simple and intuitive interface - 🔒 No ads - 💡 Customizable settings - 👍 Solid dual n-back app **Cons** - 🐛 Buggy behavior (unregistered clicks, sound issues) - 💰 Subscription model for higher levels - 🔍 Lack of clear instructions - 🔍 Difficult for beginners - 🔍 Uneven interval lengths **Commonly reported bugs** - Sudden change in sound/language - Accidental stop button presses - Inconsistent level adjustments - Scoring issues (e.g., combining square and sound scores) - Compatibility problems on certain devices **Most requested features** - Add N=1 level for beginners - Improve statistics and progress tracking - Allow changing sounds/visuals - Extend game duration beyond 60 seconds - Provide more detailed instructions ## Newest reviews (12 of 123) ### 4/5 — Really Good Product, Known to Work, Needs* Subscription *2026-05-01, version 1.5.4* First of all, N-Back wasn’t created by this app and its developers, it was made by some scientists who were trying to measure short-term memory an attention. Second, this team proved that the N-Back test can improve short-term memory and focus through repeated tests. Third and finally, while this app is free, it only goes up to the second level, limiting how far you can improve. ### 3/5 — Can’t export data *2026-03-05, version 1.5.4* I can’t export data. Why? ### 3/5 — Poor functionality and statistics *2026-02-16, version 1.5.4* Love the game, but every-time I accidentally slightly miss a button, it stops the game. Very frustrating. Also the user statistics is just not really helpful at all ### 4/5 — Thanks for the free version *2026-01-30, version 1.5.4* ad free & works ### 4/5 — Feedback *2026-01-05, version 1.5.4* Overall great app that’s highly configurable. There seems to be a bug: if you decrease the time to the max and the interval speed the final score/feedback doesn’t account for these settings. Also, it’d be great if something like a check mark or “X” were used for when screens are set to greyscale (maybe even for colorblindness?). ### 2/5 — Buggy *2025-12-08, version 1.5.4* The app does not seem to correctly register the clicks I make. Usually 1-2 times per round it indicates I’ve clicked position or sound and I have not. Even if it’s N=1 and I know the answer is not correct. ### 3/5 — Only 2 levels for fee *2025-12-08, version 1.5.4* Says level 3 is the maximum for the free tier, but it actually won’t allow you to play level 3. A monthly sub to go higher than 2 is kind of crazy. ### 3/5 — Stop button too easy to hit *2025-11-24, version 1.5.4* An otherwise well-designed app is fatally flawed with a stop button in the middle of the screen that’s too easy to hit accidentally, suddenly and frustratingingly ending an attempt. Either add a confirmation or move the button to a top corner. ### 2/5 — Locked behind a paywall *2025-11-16, version 1.5.4* It’s a good interface until you reach level four, which is locked behind a paywall. Levels two and three are very good, but considering there are so many free apps that do the same thing it’s just not worth it. ### 3/5 — Uneven intervals *2025-08-09, version 1.5.4* The interval length between tiles seems to alternate between a long and a short one. This makes it very hard to play especially with slightly shorter settings like 1.5 seconds. More generally, the sound is played with different delays, sometimes so late that it becomes hard to push the button in time. Additionally, the sounds are not always played cleanly. ### 4/5 — Subscription problem *2025-07-04, version 1.5.4* I have subscribed for the pro level but still am on the free tier Rest I love the game but please look into this ### 3/5 — Can’t do N=1 *2025-05-06, version 1.5.4* I would have given this game 5 star but you can’t do N=1 and I believe beginners should start here until they understand the game. Also, could do with better game play instructions - what exactly is N (I know but had to google) and simple demo how the game works ## Most critical reviews (10 lowest-rated) ### 1/5 — Flawed algorithm *2026-05-29, version 1.5.4* Unfortunately the app doesn’t allow you to pass onto 3-back before paying. I did make the mistake of paying and found out that the algorithm is flawed. Apparently once a square lights up, the chances of it activating again are much bigger than 1/9, which makes the experience so much worse. ### 1/5 — Odd… *2026-02-19, version 1.5.4* It said that I reached level 3 (the max on the free tier) even though I never played it lol ### 1/5 — Subscription based *2026-01-20, version 1.5.4* subscription based way to play your mobile game for memory is crazy kick rocks ### 1/5 — No E-Mail Reply From Developer *2026-01-14, version 1.5.4* I upgraded to the Pro Version but the app still says I need to upgrade. I really like the app, but for me to be able to benefit from it, I need some of the pro features. I emailed the developer twice for help but never received a reply. ### 1/5 — Trash *2026-01-13, version 1.5.4* No explanation no information about how to actually play and use the app. Terrible app ### 1/5 — Sucks *2025-12-13, version 1.5.4* Not user friendly. Makes it sound like it’s the most simple thing in the world, then I can’t seem to do anything when the game begins. Garbage ### 1/5 — No sound *2025-10-01, version 1.5.4* Sound does not play on this app when checking my sound settings it’s at 100. ### 1/5 — NOT FREE *2025-09-19, version 1.5.4* PAY TO PLAY ### 1/5 — Update broke the app *2025-08-16, version 1.5.4* The update last night made it impossible to properly use this. It is super easy to press stop unintentionally now. Please revert or move the stop button faaar away from the other ones. ### 1/5 — Buggy and no settings *2025-04-22, version 1.5.4* The title says it all. ## Most praised reviews (10 highest-rated) ### 5/5 — B *2026-02-27, version 1.5.4* 🧠 ### 5/5 — Great game *2026-02-04, version 1.5.4* Thanks for the level-up ### 5/5 — Effective Mental Exercise *2025-12-28, version 1.5.4* This app is a useful tool for training memory and mental processing speed although it is definitely frustrating and difficult at first. ### 5/5 — It’s great! Just… *2025-11-11, version 1.5.4* I just wish I was able to increase the length up to 30mins! From what I can tell, most efficacy was found in this time range in studies. Increases the challenge. Obviously you can do lots of little 2min sessions. But would be cool to do continuous. But great app otherwise, thanks so much! Ad-free, it seems :) 🙏 ### 5/5 — Use emojis as sounds 🍆 *2025-09-29, version 1.5.4* Undoes some brainrot prolly 😭 ### 5/5 — Intelligent developer *2025-06-07, version 1.5.4* The developer of this app understands the importance of intelligence and hence why they’ve made this out of the passion for intelligence. I respect that. ### 5/5 — Nice *2025-06-01, version 1.5.4* I mean, it does its job ### 5/5 — Bleh *2025-04-18, version 1.5.4* Bleh ### 5/5 — Can’t upgrade to pro *2025-04-08, version 1.5.4* Everything is great, but I can’t upgrade to pro in app. Is there any other way ? ### 5/5 — Top Notch & Appropriately Focused *2025-02-10, version 1.5.4* This game is top-notch and focused/to the point. It is exactly the way the game should be, and that is simple, true to the game, and functional. --- *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 2026-09-12.*