This is the following outline of how the program will work.

1. Intro Screen with the following options: Load, Help
2. Load:
a. The app will load an image (from the camera gallery).
b. The user will choose a select tool: rectangle, circle, half circle
c. After positioning the tool over the area, user will press the Go button
d. The image area will be cropped and saved
3. Help:
Loads a simple help text.

Note: More than 1 area can be selected and cropped when Go is pressed

Also, the attachment includes a sample interface of what the app might look like.