# Dual N-Back: Stroop & Schulte — IQ Brain Training & Chimp Test > Scientifically proven brain training for fluid intelligence and memory. (iPhone/iPad app by ROMEO ILARIO FLAVIO GAMBINO.) - Source: https://appshunter.io/ios/app/dual-n-back-stroop-and-schulte/id6775563998 (this page in markdown: same URL + `.md`) - Developer: [ROMEO ILARIO FLAVIO GAMBINO](https://appshunter.io/developer/1874823696) - Category: Education, Productivity - Price: Free - Rating: 4.00/5 from 7 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 26 MB - Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Filipino, Finnish and 34 more - Released: 2026-06-03 - Data updated: 2026-09-23 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/dual-n-back-stroop-and-schulte/id6775563998/reviews.md ## What is Dual N? Your brain has a limit: how much it can hold in mind at once. Dual N-Back is the most studied exercise for pushing that limit. WHAT'S FREE The whole Cognitive Lab, with no limit: all 12 tests, chimp memory, Stroop, reaction time. Your complete training history. And three Dual N-Back sessions a day, at N-1 and N-2. This app is built around that single exercise — not a pile of mini-games that mostly make you good at mini-games. HOW IT WORKS Two streams arrive at the same time: a position on a grid, a spoken letter. You decide whether what you're getting now matches what appeared N turns earlier. You start at N-1. Hit 80% accuracy and the next level opens. It's hard from the first minute. That's precisely why it works. UP TO SEVEN SIMULTANEOUS STREAMS • Dual — position + audio • Triple — colour joins • Quad — then shape • Penta, Hexa, Hepta — up to seven streams at once Levels N-1 through N-15. THE COGNITIVE LAB Short tests that measure something other than working memory: chimp memory, reaction time, Stroop, visual memory, sequences. Each keeps your best. YOUR NUMBERS, NOT BADGES Progress per level, accuracy broken out per stream, average reaction time, streaks. You see where you stall, not just a score. DUAL N BACK PRO • Every level, N-3 through N-15 • Triple, Quad, Penta, Hexa, Hepta • Unlimited daily sessions • Full analytics • Custom Mode and Free Mode 7 days free on the yearly plan. Lifetime available as a single payment. ON THE SCIENCE Dual N-Back is the most studied working-memory task since Jaeggi's 2008 work. Transfer to fluid intelligence is still debated in the literature. What is measurable: your progress on the task itself, and it's on screen. SUBSCRIPTION Payment is charged to your Apple account at confirmation. Renewal is automatic unless turned off at least 24 hours before the current period ends. Manage it any time in your account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Dual N-Back training - Fluid intelligence improvement - Working memory enhancement - Cognitive mini-games - Performance tracking dashboard - Modern interface ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/dual-n-back-stroop-and-schulte/id6775563998/reviews.md ### 1/5 — Sell out. *2026-09-07* Before this month your could train as much as you wanted, now it has a dumb pay wall if you want to play for more than 5 minutes. Before this was the best dual n back app, it was free and interface is great but I guess the developers weren't happy with being what people needed & decided to add a pay wall. They sold out & now I gotta find a new app if I want to play my full 10 minutes a day. Shame **Developer response:** Hi Brain-kun. My earlier reply here was wrong, and I am sorry for it: the daily limit on n-back training has not been removed. Free play is three Dual N-Back sessions a day, up to N=2; unlimited sessions and higher levels are part of Pro. What did change since your review: every Cognitive Lab game is free and unlimited again for everyone, and every offer screen has a close button. I would rather tell you exactly where the line is than have you reinstall and hit it. Support: https://romeoapps.app/en/dual-n-back/support/ ### 3/5 — Best N-back *2026-09-02* Was a great free App, now requires mandatory subscription.. **Developer response:** Hi Green Gt4.6, thank you for the review, and a correction to my earlier reply. No subscription is required to open or use the app, but free training has limits: the Dual N-Back mode, three sessions a day, up to N=2. The other n-back modes, higher levels and unlimited sessions are part of Pro. All the Cognitive Lab games are free and unlimited for everyone. Support: https://romeoapps.app/en/dual-n-back/support/ ### 5/5 — Best N-back *2026-07-27* Best N-back app for iOS 100% **Developer response:** Thank you so much for the 100% rating ! Knowing that you consider this the best N-back app on iOS truly means the world to me. Wish you the best on your brain training journey! ### 4/5 — Almost great *2026-07-20* The best n back app I have tried out of like 5. I haven’t been using long, about a week, and have only unlocked quad n back. It is feature rich and seems to be completely free as advertised. I would rate it 5 stars but have come across one issue and one missing feature so far holding it back. The triple n back mode that utilizes color, one of the colors is red and one is pink, among others like green, blue, purple, yellow. The red and pink are way too similar. I’m not sure how this made it in to be honest. The test is about memory, not discerning colors. Use white or orange or anything that isn’t so close. Also, it should allow mixing and matching variables. Let me play triple mode but with position, audio, and shape, instead of color. Also, having color as the third mode as it stands makes it so color blind people are at a disadvantage. I see no benefit to having the modes locked as they are currently. Love the app and looking forward to updates and improvements. **Developer response:** Hi purpyslurpy, thank you for such a precise review. Both points are in the app now. The color set was reworked: the pink that sat too close to red was replaced, and one of the six colors is now white (black on the light theme), as you suggested; the set was also checked against simulated color blindness. And a Custom mode lets you choose which variables to track, for example position, audio and shape without color; it is part of Pro. My earlier reply called this work in progress; it has shipped. Support: https://romeoapps.app/en/dual-n-back/support/ ### 5/5 — 9.8/10 best n-back game *2026-07-20* After playing literally all the n-back games on the App Store this is truly the best one made. Will there ever be a Game Center/leaderboard integration? Would love to compare stats with my friends. Apart from the social aspect it would greatly enhance the game if there was a daily game tracker for streaks for accomplishing certain daily goals **Developer response:** Thank you — and both of your wishes are in the app now. Game Center is built in, with leaderboards for each n-back mode, for your longest streak and for the Lab games, so you can compare with friends. There is also a daily goal: you choose how many sessions make a day count, your streak builds from it, and it shows on the home screen widget. My earlier reply called these plans; they have shipped since. Happy training! ## Frequently asked questions about Dual N ### What is Dual N Back? Dual N Back is a scientifically proven cognitive exercise designed to improve fluid intelligence. It involves remembering stimuli (visual and auditory) presented N steps back in a sequence. ### How long does it take to see results with Dual N Back? Users can start observing concrete results on their concentration and memorization skills in 4 to 6 weeks by training for just 20 minutes a day. ### Does Dual N Back have ads? No, Dual N Back is ad-free and ensures absolute confidentiality with no collection of personal data or intrusive advertising. ### What are the cognitive mini-games in Dual N Back? The app includes Chimpanzee memory, Reaction Time, Stroop Test, and Sequential Memory (Simon) to complement N-Back training and test various cognitive functions. ### Can I track my progress in Dual N Back? Yes, Dual N Back offers an ultra-detailed premium dashboard to track Cognitive Strain & Focus, Precision by Channel, Evolution Charts, and Statistics & Series. ### What devices does Dual N Back support? Based on the provided data, Dual N Back is currently supported on iPhone. ### Is Dual N Back suitable for all ages? Dual N Back has an age rating of 4+, making it suitable for a wide range of users looking to enhance their cognitive abilities. ### How often is Dual N Back updated? The app was last updated on July 24, 2026, indicating regular updates to improve features and performance. ## Version history (last 5 releases) ### 3.8.5 — 2026-09-23 Dual N-Back: buying from the App Store page now works. Your purchase is completed as soon as the app opens. The offer screen only mentions the free trial when your account is actually eligible for it. ### 3.8.4 — 2026-09-22 Faster training: the interval now goes down to 0.75 s, and the blank gap follows the pace, so a round really is one second. When a level unlocks, you can jump straight into it from the results screen. The audio setting is now called "No spoken letters", which is what it always did. ### 3.8.3 — 2026-09-21 Bug fixes. The offer screen now shows a loading indicator while prices load, instead of an error message, and retries automatically. Improved layout on iPad. ### 3.8.2 — 2026-09-19 Bug fixes. The offer screen now shows a loading indicator while prices load, instead of an error message, and retries automatically. Improved layout on iPad. ### 3.8.1 — 2026-09-17 Bug fixes. The offer screen now shows a loading indicator while prices load, instead of an error message, and retries automatically. Improved layout on iPad. ## More apps by ROMEO ILARIO FLAVIO GAMBINO - [SeductMaxx](https://appshunter.io/ios/app/seductmaxx/id6769103325) - [PuffOff: Quit Vaping & Smoking](https://appshunter.io/ios/app/puffoff-quit-vaping-and-smoking/id6789282894) - [LarpGPT: AI Photo Prompts](https://appshunter.io/ios/app/larpgpt-ai-photo-prompts/id6805626334) - [NailSafe: Stop Nail Biting](https://appshunter.io/ios/app/nailsafe-stop-nail-biting/id6805811801) - [VocalMaxx: Voice & Pitch](https://appshunter.io/ios/app/vocalmaxx-voice-and-pitch/id6806372060) All apps by ROMEO ILARIO FLAVIO GAMBINO: https://appshunter.io/developer/1874823696 ## Related topics [dual and back training](https://appshunter.io/ios/topics/dual-and-back-training) · [dual n back training](https://appshunter.io/ios/topics/dual-n-back-training) · [dual n back brain game](https://appshunter.io/ios/topics/dual-n-back-brain-game) --- *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 2026-09-23.*