While I don't make any money from the app, I do get nice emails from time to time from users. Some users report that this is their most used app!
Recently I've had a string of great feature suggestions from John, AA7US. The app has some new features which you may not find, so I'll show them here.
Tapping a spot in the spot list now more quickly shows information about that spot and also requests more detail from the QRZ.com XML API.
There's a button to show the call on the QRZ website (which unfortunately doesn't look too good on a phone).
Finally there's a button, with a search icon and the call sign, which searches the loaded spots for just that callsign.
This also works if you tap a spot on the map. The first tap shows the basic info. If you tap the Info icon you get the same detailed info.
In settings there's a button to let you use your QRZ login and if you have a paid account you'll get some extra information in the info display.
In the callsign search fields the little book icon is a button that takes you to a list of recently used callsigns.
The callsigns list is built automatically based on what you've searched. You can simply tap a callsign to put that call into the search field. The list itself is editable, swipe left to delete an entry, tap the edit button to allow you to re-order the list. This feature is nice if you like to watch a few different calls.
Finally, in Settings, if you have the Apple email client set up on your device there's a little email button that creates an email to me for feedback about the app.
The bad news is that the WSPRnet seems very slow recently and often I see requests timeout even though I have set a 30 second timeout. There's not much I can do about this, I don't want to hammer the site with more requests.
I wish there was an answer to this issue. The database of WSPR reports is a very valuable research tool.