DoDidDone (Irregular Verbs) app for iPhone and iPad

This app helps you memorize English irregular verbs by repeatedly typing on the keyboard.
It has the following functions.

- Study
    You can see the irregular verbs by eye and memorize them by typing them on the keyboard.
    The verb memorization sequence is listed every time.

- Exam
    View the verb prototype and enter the rest by typing on the keyboard.
    If you do not know? You can see the correct answer by touching it, but it will be treated as wrong.

- History
    You can check the test history and show the result score and the wrong word.
    Wrong words can be reviewed again.