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There’s a new iMessage for Android app — and it actually works
(www.theverge.com)
This is a most excellent place for technology news and articles.
https://www.androidpolice.com/messenger-wasting-battery-background-tests/
https://www.lifewire.com/how-facebook-messenger-apps-drains-battery-3880043
The app is constantly doing shit in the background (god knows what. You give permission to access your shit when you install it) to the point where there is significant noticeable battery drain. No thanks.
Now, maybe they've fixed that issue since, but we know that the "fix" would be focused on hiding it better rather than stopping the activity.