At the moment the Tawe mobile app is only available on iOS via the iTunes Store. It is free to download but does require In-App purchases to allow video rendering.
If you have an active Sparkol subscription this does not unlock publishing on the mobile app, the subscription only covers our desktop products.
Historically we have had an Android version available as well but this has been removed as some changes to this operating system means we need to make some significant development to get it working properly on newer phones. Android users who have downloaded it previously should still be able to go to their previously purchased apps and re-install it but please be aware some areas of functionality will not work as expected due to these updates.