I use Nuj Alarm Clock.

It's an app I built that charges money (goes to charity - Khan Academy) if you don't scan a barcode/QR code within a few mins of your alarm.

Also, unlike other alarm apps, you can't just turn off the phone. Alarms "lock" 1 hour before going off. When locked, they can't be changed. Alarms are stored in the cloud so if you turn off your phone after your alarm locks, you still get charged.

e.g. I have to scan my toothpaste within 5 minutes of my 7am alarm or pay $10. If I turn off my phone after 6am, I'll still get charged $10!