For the connection to be possible, you first need to make sure:
1. Healy is full charged
2. Healy is ready for operation
3. Healy is located near the smartphone (<10m)
4. Healy is not connected to another smartphone
If the issue is not solved, please also try the following articles
– How can I clear the Bluetooth Cache on my phone?
– How can I clear the App Cache on my phone?