I've used several podcast apps, and yours is the simplest and best. I most recently gave up "Beyond Pod" to use your app instead.
1) How can I send you MORE money beyond the 99-cents without having to sign up for some micropay service? Can I send money to your Paypal account?
2) If a [Circle Plus] (+) adds an episode to a queue, shouldn't a [Circle Minus] (-) remove it? Unfortunately, most users may naturally assume that the [trash can] icon complete removes selected items from the device, which is incorrect.
3) Because two different Queue options appear in the submenu, it is unclear if the two queue options share an "AND" or "OR" relationship. Perhaps a clearer way is to simplify the auto-queue options to a single submenu item. For example, with a single option button menu it is clear to the user that the choice is an "OR" relations, not an "AND" choce. For example:
Automatically Queue
These Unlistened episodes:
( ) None (Manually Queue)
( ) All Unlistened
( ) From past day
( ) From past week
( ) From past 2 weeks
( ) Most recent episode
( ) 2 recent episodes
( ) 5 recent episodes
4) Not so important, but maybe clearer if the singe submenu item was titled "Auto Queue"
5) I'm not sure if you're in North America, but when the tool tip appears for the [Circle Plus] (+) it might be clearer if you use the term "Add to Queue" rather than "Enqueue"
Since no instructions exist, I believe these simple changes would make Listen-Up easier to use especially for new users.
Thanks again for a great app!