If you've got a working app, make sure first of all to have your teacher check it out. Maybe there is a special case where your app actually doesn't work. But once you know you're good, here are some challenges to keep you going.
- First off, check to see if your app gets rid of old values. For instance if I go to deposit, does the last amount I wanted to deposit still show up. Clear that out so I can add new things in!
- Now how about some security. Make up a username and password for your account and see if the user can login. *At this stage it is okay that is only works for one person*
- Some banks are okay if you overdraft your account(meaning you took out more than you have.) They will simply charge you extra for doing so. See if you can make your app charge 25% of the overdraft amount onto the now in debt customer.
- Can you set an overdraft limit now? Where the user has the ability to tell the app how much it would be able to overdraft, and then if they go over that amount it will prevent them from doing so?