GMX makes one app for reading its mail. It runs on iPhones, iPads and Android devices. GMX offers no GMX app MacBook users can install, and no GMX app Windows users can use either. On those computers you use a browser or a mail program.

This guide shows what exists on each device and how to install it. It also covers a second account, notifications, a PIN and common fixes. All GMX facts come from GMX's websites and the two app stores, read in October 2026. We are not affiliated with GMX. BillionVerify is an email verification service. For a short definition of the provider, read what GMX is in our glossary.

Key facts (checked October 2026):

GMX's Mail app page states that the GMX Mail app runs on Android, iOS and iPadOS.

The App Store labels the iPhone version as unverified for macOS, so no GMX app MacBook version is confirmed.

The Android version has more than 10 million downloads, per its store entry.

GMX's support pages say you need not log out of the app, and they advise a PIN.

GMX's support pages…