I'm not going to give you power of attorney to play your game. and I don't want to be forced into opening a game with a 3.0 score on Google Play
Estimated from the grossing charts of Oct 23, 2026 in the 53 countries we track, and ratings growth on the App Store.
From our daily snapshots of every grossing chart.
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Measured from the store, not estimated.
From the latest 428 reviews on the Japan Google Play, Dec 8, 2017 to Oct 21, 2026: 56% are 1 or 2 stars. Open a theme to read what people wrote.
52 of the 1 and 2 star reviews.
★★★★★ There are subscriptions, Pay 2 Win, and really bad brain trainer.
★★★★★ A few simple games with no new updates or different games - forget it do waste your money like I did
★★★★★ Based on the free version it looks like it might be ok, but the subscription price is insane for what this is and how basic it is.
21 of the 1 and 2 star reviews.
★★★★★ touch screen doesn't work in the app.
★★★★★ Page 1 says to take a test, but the test is doesn't work with android 😂 Why is it even allowed in the Play Store!?
★★★★★ App is glitchy to the point it is pretty much unusable.
12 of the 1 and 2 star reviews.
★★★★★ I can't create an account, app is unusable to me
★★★★★ I subscribed for full access via the website and when I log in with the same account info, it shows I'm in the free version.
★★★★★ I just downloaded the app but can't even create an account!
10 of the 1 and 2 star reviews.
★★★★★ think this application should give you more than one game a day or free or at least let you play the one game it gives you a day more than once for free especially for when it crashes and you have to restart it not…
★★★★★ even though I'm a paid member, the damn thing won't load.
★★★★★ the first exercise crashed and I couldn't do anything.
9 of the 1 and 2 star reviews.
★★★★★ the continue arrow has to be touched above it and the touches to finish the exercises constantly do not register or register the wrong object.
★★★★★ The app is essentially useless for a cell phone.
★★★★★ This is a really strange failure mode, since touch screen accuracy has long been a solved problem.
7 of the 1 and 2 star reviews.
★★★★★ loterally have to pay for everything
★★★★★ Limited to 1 exercise per day with the free app.
★★★★★ Nott sure if it's intentionally limited with a timer or if it's bad coding.
7 of the 1 and 2 star reviews.
★★★★★ Also can't view other people's reviews in play store, lose an extra star for that.
★★★★★ After paying $100 I could use it for 1 day and then the sound and basically the instructions were gone.
★★★★★ Hence it was a complete waste of my time and I deleted it a few minutes after installing it.
6 of the 1 and 2 star reviews.
★★★★★ unable to use it - on pixel 9 it is not functional - buttons missing, or not responding
★★★★★ There is no option to try this without payment.
★★★★★ The app opens, but doesnt have any text displayed in any of the tutorials, theres no way to skip any one if them so its a dead end.
12 of the 4 and 5 star reviews.
★★★★★ It gives me a great mental workout and I find it fun and enjoyable.
★★★★★ It was not fun, so that means you get a HUGE brain boost
★★★★★ I have truly enjoyed and try system like this in a way .
10 of the 4 and 5 star reviews.
★★★★★ I like this app how it's designed, played a free game daily for some extended time.
★★★★★ The first free lesson was pretty cool.
★★★★★ Most entitled people want free training on of it.
5 of the 4 and 5 star reviews.
★★★★★ Edit after a response from the developer: they have updated the app and the touch interface issues have been corrected, and the app is just as useful as the computer version!
★★★★★ If used consistently it really helps.
★★★★★ Great app...had a couple brain tumors...this helps...rythym recall requires work,almost impossible to time with the screen or the sound.An improvement to all would be not to just keep increasing the speed,most of the…
4 of the 4 and 5 star reviews.
★★★★★ Easy to learn activities that progressively increase over time.
4 of the 4 and 5 star reviews.
★★★★★ Then I looked at the science behind the design and the studies done.
★★★★★ Edit after a response from the developer: they have updated the app and the touch interface issues have been corrected, and the app is just as useful as the computer version!
★★★★★ Excellent science, app design is a bit eh
Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.
Latest reviews, Japan Google Play.
I'm not going to give you power of attorney to play your game. and I don't want to be forced into opening a game with a 3.0 score on Google Play
just amazing
Worst brain test app ever. I found an ad saying its "scientific" but after testing it out it is the worst app to ever exist. There are subscriptions, Pay 2 Win, and really bad brain trainer. I expected all exercises unlocked, but instead, you go on "What do you want to improve on?" Like show all of the exercises! Like what the hell is this kind of brain test app? At this point, its not a brain trainer, its a Pay 2 Win trainer.
I subscribed and it wont let me do more than my trial, its difficult for people with brain issues. Frustration doesn't help. tried to cx and said I wasn't found so I tried to sign back up and it said I already exist. I dont have the extra money to blow. I really enjoyed my free trail but it didn't do anything else once I purchased it.
I imagine it's good at what it does, but there is zero fun involved. I expected the app to employ more gamification to make users feel like they've made progress. Instead, it's a joyless slog. I need to find something else because this is just depressing. (And yes, I have the paid version.)
it's alright
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