File transfer over BLE to smart phone or other devices

Hi,

We are building a mobile application as part of our study project. We are using this app to connect to BangleJS and read the activity data and show data on graphically.

What we have done so far:

1. Storing activity data in a file on BangleJS
   
2. Created a mobile app(used reactnative) to connect to bangleJS
   
   

Now, I am looking for a way to push activity data file from bangleJS to mobile app. Is there any straightforward way?

Thanks,
Sachin