Word Tester is used to learn how to spell native or foreign words. You or someone else can speak words to make a test. When you test yourself, you listen to the spoken words and type the words you hear until you get it right. Your tests and results are stored so you can revisit them as often as you like.
The app also works when you are not online.
Word Tester is especially great to learn foreign words. You can speak in a word in one language and type in the word in another or the same language.