Android?
With these simple image based exercises you can build or refresh your vocabulary. Each unit addresses the key words on a given topic. When learning you go through three phases:
Here you will be able to explore the spelling and pronunciation of words. To do this click on the speech bubbles. Make sure that your speakers are on. Otherwise you will miss something ;-).
Now you can try to remember the meanings of the words. Listen and read the word and click on the appropriate bubble. Then continue with the next word.
At the end you can test whether you actively master the vocabulary. A question mark appears in one of the speech bubbles. First click on the determiner and then click on the letters in the correct order to form the word.