SourFriend User GuideApp & connection
Understanding Bluetooth and Wi-Fi
SourFriend connects to the app in two ways: Bluetooth and Wi-Fi. Both send fermentation data to the app, and that data is how SourFriend learns your starter. The difference is what happens when your phone moves away.
Bluetooth and Wi-Fi
- Bluetooth
- Used for pairing and setup. The connection drops when your phone moves away from SourFriend.
- Wi-Fi
- Recommended. The connection stays on even when your phone is away, so fermentation data keeps syncing. Only 2.4GHz networks are supported.
Why we recommend Wi-Fi
Over Wi-Fi, data keeps syncing even when your phone is away. Over Bluetooth, the connection drops when your phone moves away. Sessions recorded in the meantime sync when you reconnect, but SourFriend can store only a limited amount of data.
Bluetooth only?
The connection drops when your phone moves away. Sessions recorded in the meantime sync when you reconnect, but SourFriend can store only a limited amount of data. Open the app near SourFriend at least once every 3 days.
Good to know
- Pair over Bluetooth first. Wi-Fi is set up in the app while SourFriend is connected over Bluetooth.
- SourFriend supports 2.4GHz Wi-Fi only. 5GHz networks are not supported.
- Without the app, Quick Mode and Storage Mode still work, but Delayed Mode uses default timing only.


