Hi Nemanja,
I pratice the skills aquired in the learning paths doing an app that helps me to organize my money.
I manage to make:
- An account management;
- The creation of new entries (earnings or expenses);
- Proccessing and show the flow of account ballance, showing when the balance go down to zero;
- Making a projection of balance of account in a specific day, after add all entries in an account;
- After do it to web, i made this app to mobile too.
Another app I did was proccessing same data of public webservices, like Wikipedia.
Hope it helps, and good learnings. =)