價格：免費
更新日期：2018-02-12
檔案大小：17M
目前版本：2
版本需求：Android 4.0.3 以上版本
官方網站：http://www.dooreelkow.com/
Email：durilka@gmail.com
聯絡地址：Münzgasse 3 4001 Basel Switzerland
A simple app to help you learn addition of numbers up to 20 with exciting statistics and a heatmap. The result sum doesn't exceed 23.
A student is offered a correct answer as well as a choice of answers similar to the correct one, so attention is required.
In case of a mistake, the question is put for a repetition in 3 and 10 steps after current.
No ads.
No IAP.
Works offline.
