Математика. 1 класс. is a free Android app developed by Келешек-2030. The app is categorized under Education & Reference and aims to help students prepare for criterion-based assessments. The app offers a variety of exercises that promote the development of memory, attention, observation, imagination, and non-standard logical thinking. It also helps develop the cognitive and creative abilities of first-graders. Parents can use the app to train and test their child's knowledge, while teachers can use it as supplementary material for optional or extracurricular activities.

The app allows users to take three attempts to complete any test before requiring a subscription to continue using the app.