Get the Fastmail app from the App Store and set it up in about a minute. It’s the same app on both iPhone and iPad, so these steps work for either.
Install it in five steps
Open the App Store
On your iPhone or iPad.
Search for Fastmail
Tap Search, type Fastmail, and search.
Pick the official app
Tap the official Fastmail – Email & Calendar app.
Install it
Tap Get (confirm with Face ID, Touch ID, or your Apple Account if asked).
Open it and sign in
Tap Open, then sign in.
Make sure it’s the official app. The right one is Fastmail – Email & Calendar from the developer Fastmail. It’s free and rated 4+. If you see similarly named apps, check the developer before tapping Get.
Signing in is covered separately. See the Signing In guide.