Yeontan Math Games: Brain Gym

Yeontan Math Games is math practice without ads. Five minutes a day, ten problems per set.

■ Who it is for
· Children learning times tables and mental arithmetic
· Middle schoolers reviewing integers and equations
· Adults who want to keep their calculation sharp

■ Free
Addition, subtraction, multiplication, division and times tables up to level 10, in several formats: type the answer, true or false, fill the blank, compare. Everyday Math, word problems that turn real-life scenes into equations, is free through the elementary range (level 10). The mini-games 2048 and Make 24 (some modes) and a two-player Duel on one device are free too. The times table check (tables 2 to 9) and last week's report are free as well.

■ With Pro
Advanced elementary topics (mixed operations, negative numbers, fractions, decimals, percentages, squares and roots) and all of middle-school math, grades 7 to 9. Everyday Math continues into middle-school word problems (ages, speed, simultaneous equations and more). Levels up to 30, Sudoku, every Beat the Clock mode, all-time statistics, week-over-week comparison, the full mistakes notebook, replays of past daily challenges and five family profiles.

■ What makes it different
· No ads. Not even in the free version.
· Levels adjust themselves. The next session follows your accuracy and speed.
· Wrong answers go to the mistakes notebook and come back in a later session. Look at the explanation again, or replay only the ones you missed.
· Times table check: choose a table, an order (in order, backwards or mixed) and a target time (20, 15 or 10 seconds), then check one table.
· Accuracy and time per problem are kept as charts, and last week's report sums up your week.
· Three daily challenge sets are chosen for you, and your streak builds up. Once a month, one missed day doesn't break it.
· Foldables and tablets use the whole screen. Unfolded, the problem and the keypad sit side by side.
· Works offline. No account, no sign-in.
· Friend tab: earn kibble by solving problems and use it to feed, water and play with a kitten. No penalties, no notifications, and kibble can't be bought.

■ Using it with a child
Pick "A child will" on first run and a guardian sets a four-digit PIN. Purchases, profile changes and clearing history all ask for that PIN, and kid screens show no external links or contact addresses.

■ Pro is a one-time purchase
Not a subscription, nothing renews. Restore it on other devices with the same Google account, and share it through Google Play Family Library.

■ Privacy
The developer collects nothing. There is no developer server, and your practice history stays on this device.

Contact: [email protected]