Särmä Plus is an Android-based educational application developed by Kustannusosakeyhtiö Otava. It is a free app, designed for high school students who want to access the Särmä series' e-books and audiobooks. With Särmä Plus, users can read and listen to the books related to the Särmä series and enhance their education and reference.

The app works with Otavan Opiskelijan maailman and Opepalvelun käyttäjätunnuksella, which makes it accessible to students with an account. The app's interface is simple to use and navigate, making it easy for students to find and access the books they need. Särmä Plus is compatible with Android 13.0 and provides a convenient platform for students to access the Särmä series' books.