https://bsrummy.com

This free app is ad supported and may contain ads in the notification tray and/or home screen...you can easily opt out (it's a one time thing for your entire device). Experimenting w/ ad networks..sorry :-)

This is an interactive DIP switch configuration app for RadioPopper's (http://www.radiopopper.com) JrX Studio wireless speedlight/strobe triggers.

Yes, it's overkill, but it's convenient and always with you if you have your Android phone so you don't have to go digging for the little reference cards they give you. Besides, it's cooler than a photo of the reference card ;-)