Stripe Express is available for iOS and can be downloaded here: https://apps.apple.com/us/app/stripe-express/id1560214813.
Please note that you will not be able to access your Stripe Express account through the Stripe Stripe Dashboard app available in the Apple store. Your Stripe Express account can only be accessed via the Stripe Express iOS app or via a web browser.
Stripe Express is not yet available for Android. If you are an Android user, you can still access your Stripe Express account and any available tax forms in a web browser by following the link emailed to you by Stripe on any web-enabled device, such as a web browser on your mobile device or a laptop or desktop computer.
Please note that you will not be able to access your Stripe Express account through the Stripe Dashboard app available in the Google Play store. Your Stripe Express account can only be accessed via the Stripe Express iOS app or via a web browser.