Spanish Ortography

This app was originally designed to help kids to improve their Spanish skills at school. But it can be used also by spanish language students.
There are three activities:
Converting units: you are asked to convert quantities between different units for measuring length, volume and weight. You get points until an error occurs.
Accent mark: the app will show you a word without accent mark. Then you have to press on the vowel in which it should be placed, or indicate that there is no accent mark.
BV .: the app shows you a word with a missing letter. Then you have to choose whether it should be placed a B or V.
You can use this app to improve your spanish language skills.

It is also useful for people not so young remember things forgotten.