FastMail is an amazing company. Their UI is old school and packs a punch. Their mobile app is fantastic. They also invented some new JSON based email standard: https://jmap.io/

I Love fastmail,just renewed my yearly subscription. Having that said, the mobile app is not fantastic at all. Try working with it with a poor or non-existent connection and good luck even accessing your calendar

I’ve used their mobile app on iPhone just for reading email. It’s great! But I guess it can be better.

Last I tried their mobile app it was just an embedded web browser, quite the turnoff.

Has that changed?

Haven’t had any problems with it. You’re right, it’s not native.

I’m a fan of their HTML style which is perhaps why I like their browser based email app.

Mobile app is serviceable, not fantastic. On iOS if you tap on an email notification it'll just open the app showing some old email, not the one I just clicked. Why?

That said, I'm a very happy paying customer.

since fastmail supports push via the default iOS mail.app for a while now I just deleted their own app