This is an app for learning and memorizing Spanish verbs - their forms and conjugations. You can find the verb you need by typing it in Spanish or the Russian or English translation. There is also an "exercise" mode - a set of verbs will be generated and you will need to enter it in the correct grammatical form. At the end of the task, a report is generated with errors that you can correct immediately.
The application also includes a reference guide on Spanish verbal periphrases (tener que, hay que, dejar de...). It contains a brief description and a couple of usage examples.