Hey guys,
I'm the creator of the app.
Currently "n" value can be max. 7, single task to quad task streams available with many combinations with letters, numbers (also as audio these 2), colors, shapes, cell position.
Grid mode can be either 1x3 or 3x3, but there are also non-grid modes and few modifiers for grid mode to make it more challenging.
Also something nifty is that it has dual audio stimuli mode with a different sound letter/number per ear (needs headset/hands free) which can be played from dual to quad tasks.
Data is saved locally. There is no backend, no analytics whatsoever, only Crashlytics for error reporting.
On iOS there is the option to sync data to iCloud so that on any other device used with same iCloud account the user has his/her history there (in the Streak Screen).
Somewhat similar architecture on Android, except the user has to upload himself the data to preferred cloud provider.
The app also has good tablet layout, simple UI overall, and is available in 12 languages.
One time payment for lifetime premium available, decent amount.
I do have in mind future releases and I would be curious to know what do you guys think of it, how would you improve it?
App Store linkGoogle Play Store link