하루암산

Haru Mental Calculation is a timer-based mental arithmetic training app designed for those who need to calculate quickly and accurately under time pressure. It is suitable for job seekers and students preparing for the quantitative sections of aptitude tests (such as GSAT), NCS, and PSAT, as well as anyone looking to revive their dulled calculation skills.

Solve basic arithmetic problems in a rush with 90-second sprints, and identify exactly where you are slowing down through accuracy, speed, and combo flow reviews.

Haru Mental Calculation People who train with Haru Mental Math:

- Job seekers who want to increase their calculation speed in the quantitative section of the Aptitude Test, NCS, and PSAT

- Test-takers who run out of time in Data Interpretation

- Office workers who want to revive their calculation skills with short daily sessions

Key Features

- 90-Second Daily Sprint — The standard format for time-limited calculation training

- Speed, Accuracy, Multiplication, Comparison, Mixed, and Deep Focus modes

- Progress review showing rhythm, accuracy, combo, and level flow

- Practice specific question types using incorrect answer reviews and weakness cards

- Daily result sharing cards to continue streaks with friends

- Visual math puzzles such as number mazes, 24-making, and magic squares

- Local reminders to set at your desired time

Haru Mental Math can be used without an account. Ads may be displayed during certain sections of the free trial, while Pro and Daily Warmup are ad-free. Progress records are saved on your device.