Stolbik Lite is a free Android app that allows you to perform math calculations by column method. It is a simplified version of the full Stolbik app, with the absence of multiplication and division functions, and includes advertisements.

The app aims to help users master and consolidate the ability to perform column calculations without pen and paper. It offers an engaging way to solve examples, turning it into an exciting puzzle that interests both children and adults. In difficult situations, users can access the "Help" button, which explains each step of the calculation at length with illustrations.

Overall, Stolbik Lite is a useful and fun app for those looking to improve their column calculation skills. However, the absence of multiplication and division functions may limit its usefulness for some users.