Discourse offers an app for iOS and Android devices. You install the app, tap the
+ Add your first site button in the middle, type in
talk.macpowerusers.com, press connect once it has done the setup, then login - the final step is to authorise the app.
You can also change your preferred theme - this works on all platforms. Simply tap on the profile icon in the top right hand corner, and select Dark or Light to match your preferences. If you prefer to set one theme for all your devices at once, then you can do so under Interface, make sure the box for “Make this my default theme on all devices” is set and then Save Changes.