besides my ipad, I have a Galaxy Tab and I was thinking of using it in my setup as a secondary display for Setlist Maker. I've already purchased it on Google Play. I'd like to sync the databases and possibly do the bluetooth remote control. Do I need to do the in-app purchases for these items on both devices in order for it to work? The ipad will basically be the "master" and the Galaxy will be the slave in this setup.