PlusMinMath is a math coach app designed for primary school children, particularly from Group 3 and Group 4, and is also suitable for Group 5. It is a fun and interactive way for children to learn and practice mental arithmetic and automate calculation sums that are still challenging for them.

The app offers several types of sums, including addition, subtraction, multiplication tables (times tables) from 1 to 10, and divisions. It has a total of 90 levels that gradually increase in difficulty, making it challenging and engaging for children.

The app features multiple choice questions as well as open-ended questions, and children can check their inputs against survey results to track their progress. Moreover, it is integrated with Google Play, making it easy to access and download.

Overall, PlusMinMath is a simple yet effective app that can help children improve their math skills while having fun.