I would like to make a program where I will make a polygon on the map and when I am inside it (the program monitors my movements using GPS), and measures and records my time while I am in the polygon.
Useful tools for one way to approach this Project:
Polygon (in or outside the polygon (there is a tool to do determine if in or out of the polygon) and provides away to create / display the polygon on a map)
TinyDB (store/save coordinate results on the device)
Issues:
You can not with Blocks monitor continuously without a StayAwake routine or an extension. App Inventor apps do not run in the background natively. A partial solution for your app using an extension:
Another way: use http://geojson.io/ to build your polygon; import the polygon as a FeatureCollection.
and another way
Search the forum for many more examples for pieces of your proposed app.
Good luck.
Here are some resources to help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook http://www.appinventor.org/book2 ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.