Rainbows toán tư duy Soroban is an Android app developed by Cộng Đồng Soroban, designed to enhance mental calculation skills. The app is a part of the Soroban Research and Training Academy - Soroban Community Rainbows. It is a free app that falls under the Education & Reference category.

This app offers several subjects, including Soroban Math, Finger Math, Mental Arithmetic, English, Spelling, and Mathematics from grades 1 to 3. The app has various learning modes, including basic to advanced levels, which continuously improve the learner's abilities. The app also has a feature that accumulates points and rewards learners to motivate them. Additionally, the app has a feature that saves the learner's training history, which helps evaluate and analyze their progress by generating charts and graphs, providing an effective learning path for the learner.

Overall, Rainbows toán tư duy Soroban is an excellent app for learners who want to enhance their mental calculation skills.