My phone battery is draining keeping the whoop app on. What is the disadvantage of closing it?
Alarm doesn’t work unless app is open and I have known it to take up to 1/2 an hour to catch up 8 hours of data. I hate that we need to keep the device open. Oura ring is a similar screen-less device and that is always closed on my end and I sync first thing in the morning, takes less than a minute.. 
Yes another problem. I’m not a fan of keeping an app open overnight and leave WiFi on.