Tes Koran is an Android app developed by Intelligence Studio that aims to help users improve their math skills, specifically their speed and concentration. The app is designed to be simple and user-friendly, making it easy for anyone to use.

The app is a great tool for children who are looking to improve their math skills, as it provides a fun and engaging way to practice. The app's interface is clean and straightforward, with a focus on providing a distraction-free environment for users to concentrate on their math problems. The app is also free to use, making it accessible to anyone who wants to improve their math skills without spending money.

Overall, Tes Koran is an effective and straightforward math practice app that is perfect for anyone looking to improve their math skills. Its simplicity and user-friendly interface make it a great choice for both children and adults alike.