I have very limited experience. The client seems to log you out once in a while, as if it's a banking app. That's been an annoyance for me. On the free tier, yo

I have very limited experience. The client seems to log you out once in a while, as if it's a banking app. That's been an annoyance for me. On the free tier, you cannot login to more than one account at a time on the app. That's another annoyance. You cannot export your mails from ProtonMail unless you have a paid account and use a computer with their IMAP bridge software installed.