I've been using the app fro some time on my Ubuntu and I LOVE it! The only thing that bugs me is whether or not would be possible to enhance the possible wallpaper changing internal for more than 60 minutes (up to 1 day). It would be also great, if first is manageable, to enhance the possible wallpaper download interval selection appropriately.
I hope you will consider my request.
Thank you very much, in advance.
Keep up the good work!