About this app
This app that you can practice flash mental arithmetic. You can review the calculation process by tapping the confirmation button after calculation. In addition, since the question which was made is saved in the past log, you can rechallenge the mistaken problem later. The past logs are saved for 10 questions before purchase, and 150 questions can be saved after purchase. ■ Past log Challenge mode, practice mode questions and results are automatically saved. Touch the challenge button to re-challenge the question. The past logs are saved for 10 questions before purchase and 150 questions are stored after purchase.
Latest release
What’s New
bug fix.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 21, 2026 · 11:58 PM Free
Screenshots
