At the moment, Indy is available on your desktop or laptop web browsers.
Indy can also be assessed from your phone's web browser (mobile-web). Mobile-web is currently in beta — Invoices is fully accessible on mobile-web but all other tools are in a read-only state. We are actively working on bringing all of Indy's to mobile.
Interested in seeing Indy as an app for iOS and Android? Let us know!