This is a context based todo app which was created as a side project for my lecture in Pervasive Computing.
You can select the relevant location for each item on the list and set the radius you want to be remindet in.
Another way of creating a task is just by long-clicking the location on the map and then filling in the details.
Different circle colors code different categories 
The second part of this app involves a server side. You can open the website on your PC and scan the QR code with the app on your phone.
The phone will send a push notification with the existing tasks and you will see them on the PC. You can then edit on both devices 