Concentration Grid vs Fun Race 3D: Running & Parkour

How do Concentration Grid and Fun Race 3D: Running & Parkour compare on difficulty, ad pressure, in-app-purchase pressure and what real reviewers say? A side-by-side look, grounded in App Store data.

	Concentration Grid	Fun Race 3D: Running & Parkour
Genre	Sports	Sports
Price	Paid	Free
Difficulty	medium	medium
Ad intensity	none	high
In-app-purchase pressure	none	medium
Typical session	short	short
Rating	4.3 / 5	4.6 / 5
Ratings count	7	804,856
Reviews say	What players like Effective mental training tool for athletes Quick brain exercise Customizable grid difficulty Common complaints Screen freezes and goes white Scattered red numbers can make it harder to locate targets	What players like Fun parkour and racing gameplay Wide character customization options Creative course-building in Fun City mode Common complaints Excessive ads between levels Ads interrupt gameplay flow significantly Opponent AI feels artificial and predictable

Concentration Grid — A mental focus grid exercise where you tap numbers in sequence as fast as possible to train athletic concentration. (rated medium difficulty, none ad pressure) Fun Race 3D: Running & Parkour — Race and parkour through obstacle-filled levels against opponents while customizing your character and building your own Fun City. (rated medium difficulty, high ad pressure)

Data: Apple App Store, as of 2026-08-24. Last updated 2026-08-24.