I have the same problem. The app quits despite battery optimization being disabled. I hope the problem will be resolved soon.
CMF Watch Pro not connecting to phone when the app isn't open
7 days later
Same problem here, just got the watch and wondered why I wasn’t recieving notifications from applications I configured earlier. Checked the phone and I didn’t see the “connected” notification. Opened the CMF app, everything synced and I started recieving notifications.
Hopefully this is fixed soon™.
It has been like this since day 1, I have just disabled the notifications because it became annoying for me.
I was about to purchase the watch, I’ll hold off for CMF watch pro 2.
7 days later
- (Edited)
Hello same here,when the cmf app is open watch works well except calls from facebook messenger and WhatsApp don’t work, after clearing recent apps from the phone watch disconnects only from the cmf app, if you control the bluetooth in the phone settings you will see connected watch.
Not receiving calls from Facebook Messenger/Whatsapp is a real problem.
I hope that all the notification and Bluetooth connection problems will be resolved as soon as possible.
Thank you.
Hoping this problem gets fixed ASAP.
Same issue once app closed watch disconnects 
7 days later
updated to latest version and stays connected till a few minutes and after that i miss every notification.
Before a Huwawei watch and that’s stays connected till battery is empty. Why is this so hard for this watch!!!!
Fix this..
I have the same problem, since i bought the smartwatch, i do not understand why this is not fixed! I hope the team could fix this soon. Thanks
Derren Just got an update V11.0.0.49. The problem persists. The app doesn’t keep running in the background for seamless tracking and sync.
Same problem here since day one. Otherwise the watch is great for the price barring the bezels.
- (Edited)
Same problem here
Updating the Firmware will Not fix this issue. The App on your Phone needs a fix in my opinion
- (Edited)
StefanFischer If that’s the case, someone would have posted a solution in this chat. I see only complaints here in the thread. Not sure if it is a problem in the App as it connects well and syncs immediately after the app is opened. However, it shuts as soon as the it is closed and cleared from the “recent apps” tray.
A temporary solution is to lock the CMF App in the “Recents App tray” so that it stays open in the background irrespective of you clearing out other background running apps. Most of the android devices have a way to do this. Not sure about Iphones though.
I have a question. Can anyone tell me how to check my SpO2 level on the watch? Thanks.
- (Edited)
The connection problem is fixed as of last update, 4 days ago. Mine hasn’t disconnected yet since.
GordonLutz Did you reinstall the CMF App? Coz I did and nothing happened. The problem remains even though the “Running in Background” toggle is ON. I have to keep the App locked in the “Recents” tray for it to remain connected in the background.
Hey,
I just got my watch pro 2 days ago, and i also have this problem.
Ive updated watch and app. I use Nothing Phone 2
The connection problem is fixed as of last update, 4 days ago. Mine hasn’t disconnected yet since.
Unfortunatly this is not true, disconnections are still a problem even after the app update