This app will help you to learn all of the German irregular verbs in a short period of time effectively and it's free.
This app is as simple as useful. Learn German irregular verbs in the theory section and do the suggested tests. There is a possibility to highlight the verbs that you consider as more difficult, which means that you can identify them easily later on. This app is convenient to use wherever you are so it doesn’t matter whether you are on the move or just relaxing in the house. Moreover, you can select the translation of the verbs in several languages.
Also, do not forget that it includes the links to other free language learning apps that you might find useful.