About this app
The Kraepelin test is: Add adjacent numbers, and answer the last digit. For example, if the numbers in a row are 3 and 9, 3+9=12, the correct answer is 2. Kraepelin consists of 15 minuites in the first half, 5 minuites rest, and 15 minuits in the second half. We recommend 15 sets of 60s for practical training with our App. Features: Custom operator mode You can train with the combination of「+」,「-」, and「×」. (Not only for the Kraepelin preparation, but for brain training or calculation practice.) Test assessment Your test result is evaluated in ranks S to C. Practice repeatedly with high concentration, and aim for S rank! Hand-writing (PRO version) More authentic preparation is possible with hand writing mode. Write an answer with your finger, it will be automatically recognized and you can answer smoothly. PRO version (In-app purchase) Features below are available for PRO version ・Hand-writing ・De-activate all ads in this app You can purchase from within this App. This is outright purchase, not a subscription purchase.
Latest release
What’s New
- fixed a bug.
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 Sep 1, 2026 · 2:56 PM Free
Screenshots
