According to the feedbacks from prototype 2, I revised:
• Enlarge Text and test on the phone
• Add logout button on profile page
• Add a special icon for some restaurants which have special offers to help users get information easily.
• When you finish the all the stamps collection, all the stamps will be shining.
• Change “Sign in” to “Create an account”.
• Delete language bar.
• Simplified tap bar to be more efficient to access on QR scanning.
• Add more restaurants sample in my prototype.
Marvel prototype: https://marvelapp.com/55104ch