Mike

On the details card include a button which opens up the default email app with email and subject automatically included.

Something like this: https://github.com/Espiandev/ShowcaseView

Will a device that does not have an SD card not work with the downloader?

The links list should be organized like: Main links ... ... Science or Fiction ... ... ...

It's hard to reproduce but something like this: 1. Play an episode 2. Click to see that episode's details 3. Switch to the Links tab 4. Select a link to...