As you may know the pinephone is a phone running a regular arm linux distro with touch screen tweaks. That does mean that there is only compatiblity with desktop linux applications and applications made for linux phones. Most of the main applications that people use on their android and ios phones are not supported by the linux based distros (anbox makes android apps work but not even close to good enough for main use).
That is when you have to find alternitives or clients that connect to the services that you want to use. If the software or app you want to use does not work on a web browser then you need to use native apps.
I will be going over some applications I use on my pinephone.
Excpet another blog post explaning how the various applications work on the pinephone.
Galculator - Caculator application that formats better then gnome caculator
Giara - Reddit
Lollypop - Music player
Mpv - video player
Celluloid - Another video player with bigger controls but more choppy framerate
Tootle - Mastodon
Telegram desktop - Telegram
Gnome Weather - Weather
Geary - Email
Gnome Podcasts - podcasts
Pure maps - Navagation maps