The app consists of two parts, the part for students is completely free and can be accessed without more than an email and a nickname, this version saves all data on the phone and does not have access to group functions (classification, recovery of data on another mobile, errors ....). The second part manages the data of the students of a certain group, storing the scores and errors of each exercise, recovering when logging in on a different mobile, notes by evaluable standards (predetermined or customizable weights).