# The Stroop Effect > Psychological test app for focus and concentration using the Stroop effect. (iPhone/iPad app by Coral Team B.V..) - Source: https://appshunter.io/ios/app/the-stroop-effect/id472707380 (this page in markdown: same URL + `.md`) - Developer: [Coral Team B.V.](https://appshunter.io/developer/1440041455) - Category: Entertainment, Games, Family, Puzzle - Price: $0.99 - Rating: 4.00/5 from 20 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 36 MB - Languages: American English, Russian - Released: 2011-10-26 - Data updated: 2026-08-17 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/the-stroop-effect/id472707380/reviews.md ## What is The Stroop Effect? Check your ability to focus your mind despite interference! We invite you to test yourself with the so-called Stroop Test adopted for iPad. Stroop Effect app is a fun experiment in neuropsychology. Find out how your brain is playing tricks on you. See if you can train your brain to ignore interference. There are 3 variations: - No interference - Light interference - Heavy interference In each version you must tap the color of the word and NOT the color described by it. For example: if the word Blue is printed in red ink - you should choose Red as the answer. You will get one point for each correct answer and minus one point for each incorrect answer. You have 30 seconds in each test. Do your best! Features: - develop your memory and concentration - train your ability to focus - compare results with other players in the Game Center - great fun for a company of friends Why? The words themselves have a strong influence on your ability to say the color. The interference between the different information (what the words say and the color of the words) your brain receives causes a problem. There are two theories that may explain the Stroop effect: Speed of Processing Theory: the interference occurs because words are read faster than colors are named. Selective Attention Theory: the interference occurs because naming colors requires more attention than reading words. The interference effect suggests you're not always in complete control of what you pay attention to! ## Key features - Stroop Test variations - Develop memory and concentration - Train ability to focus - Compare results with others - Timed challenges ## Chart rankings - #190 in Top Paid · Entertainment (US App Store) ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/the-stroop-effect/id472707380/reviews.md ### 2/5 — Could easily be improved *2015-12-19* This game has a big flaw. It only took me two tries to memorize the order of the color/word responses in level 3, which defeats the challenge. (i.e. After two tries, you don't need to read the words, you just focus on the colors and file them in memorized spatial slots.) This could be easily fixed by randomizing the order of the words in the bottom row each time the game is played. ### 4/5 — Fun and simple *2012-07-18* This is a fun little app, easy to use and fun to practice. My seven and nine year olds liked it as well. ### 5/5 — AMAZING FUN. *2012-02-05* It was so amazing, I HAD to write a review. It's so much fun, so simple, and so easy and JUST. SO. MUCH. FUN. Like, it has to be on your iPad. Like, right now. Now if you'll excuse me, I'm going to go finish playing. (Elvis Voice) Thank you very much. ## Frequently asked questions about The Stroop Effect ### What is The Stroop Effect app? The Stroop Effect app is a psychological experiment designed to test your ability to focus and concentrate. It presents words printed in different colored inks, challenging you to identify the ink color while ignoring the word's meaning. ### How does The Stroop Effect app work? You are presented with words like 'Blue' printed in red ink. You must tap the color of the ink (Red in this example) and not the word itself. You have 30 seconds per test to score points for correct answers. ### What are the different modes in The Stroop Effect app? The app offers three variations: 'No interference', 'Light interference', and 'Heavy interference'. These modes progressively increase the difficulty of the cognitive challenge. ### Can I play The Stroop Effect app with friends? Yes, the app is described as great fun for a company of friends. You can also compare your results with other players through Game Center integration. ### What devices does The Stroop Effect app support? The Stroop Effect app is available on iPhone, iPad, and iPod. It is rated for ages 4 and up. ### How much does The Stroop Effect app cost? The Stroop Effect app is a paid application, priced at $0.99. It does not feature in-app purchases or advertisements. ### When was The Stroop Effect app last updated? The Stroop Effect app was last updated on July 15, 2026, with version 1.3. It was originally released on October 26, 2011. ### What is the user rating for The Stroop Effect app? The Stroop Effect app has a rating of 4.0 stars based on 20 ratings, indicating a generally positive user reception. ## Version history (last 5 releases) ### 1.3 — 2026-07-15 The Stroop Effect is back — fully rebuilt for today's iPhone and iPad! • Modernized for the latest iOS and current devices, with full support for edge-to-edge displays • Correct, crisp proportions on every screen size • Brand-new high-resolution app icon and launch screen • Rebuilt Game Center leaderboards • Many stability and performance improvements under the hood Thank you for playing — now go challenge your focus! ### 1.2 — 2012-08-21 Bug fixes. ### 1.1 — 2012-06-21 The Stroop Effect is now a Universal app, available for both iPhone and iPad. Russian localization added. ### 1.0.1 — 2011-11-02 Sounds added. ### 1.0 — 2011-10-26 No release notes. ## More apps by Coral Team B.V. - [Baby Learns Simple Shapes](https://appshunter.io/ios/app/baby-learns-simple-shapes/id566954426) - [Baby Learns Colors!](https://appshunter.io/ios/app/baby-learns-colors/id1553283716) - [Baby Learns Simple Objects!](https://appshunter.io/ios/app/baby-learns-simple-objects/id1553295078) All apps by Coral Team B.V.: https://appshunter.io/developer/1440041455 ## Related topics [stroop effect](https://appshunter.io/ios/topics/stroop-effect) --- *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 2026-08-17.*