Setting up Tailscale on iOS
Tailscale works with iOS 12.0 or later. It supports both iPhone and iPad.
Download Tailscale from the App Store.
Launch the app and accept the prompts to install a VPN configuration and allow push notifications. (Push notifications serve to alert users that they need to reauthenticate, for example, when keys are about to expire.)
Tap the Reauthenticate button to launch the authentication dialog, and sign up using your team email address.
Congratulations! You’ve added your iPhone (or iPad) to your Tailscale network.