Crash reports from RSSRadio are normally automatically sent (with your consent). Sometimes I may ask you to send a crash report manually, here is how to do it.
Open the Settings app
iOS7: Go to General , About, Diagnostics and Usage,Diagnostics and Usage Data
iOS8: Go to Privacy, Diagnostics and Usage, Diagnostics and Usage Data
Find the last one for RSSRadio7, the date is in the filename
(iOS 10 or before, Copy the whole thing, this can be tricky so some patience is required.) (iOS11 there is a share icon top right)
Paste the crash report into an email and send to firstname.lastname@example.org