The app is annoyibg, i use messenger both on my laptop and on my phone, and even though i have already read most of my messages through my laptop it still notifies me way later wheb i open my phone, like so manychanges are added but the usability of the app itsepf is awaful, it lags, slow, and unconditionally reaaly iritating. If my school didnt require me to havr groupmates and send notifications through it i would never ever use this app ever.