Android Fitness App: Coding using Garmin data

This is a simple app for a niche fitness application. It has been built to rough prototype stage. I need someone who has worked with fitness data from Garmin Connect before to sort out some bugs. For example, prototype picks up data that is automatically stored whenever user logs an activity, but fails to pick up data that has been manually entered into Garmin by user. This needs to be fixed so that all data within a certain category is picked up by app.

If you would like to help, please tell me what you have done in the past that is directly relevant for this project.