@lyyn @rakoo @fell in our measurements delta manages to consume less battery when there are no gplay services as it can do efficient idling. Google fcm and play have their own overheads even if their purpose it to prevent apps from consuming too much battery. With the upcoming FCM Push Service integration for Chatmail users we might redo these measurements but there is a wide variety of setups on Android so not so easy.
@delta @rakoo @fell Hmm, if you are integrating FCM into Chatmail do you have plans to add UnifiedPush support? I saw a discussion thread on your forums, but it was closed 3 years ago.