Good app; confusing in-app purchases
Most paid apps work in all your devices once you have paid for them. So I bought the pro version on my iPad, figuring I could test it there, then use it on my iPhone. The icon showed up on the phone, but when I first launched it and tried to use the Pro feature, it asked me to buy it again! The solution was to go to the App Store on the phone, and find the "purchased" list; clicking Open gave me the Pro version without another purchase.
laconic2 about
Pro Metronome - Tempo, Beats