Oh, and you might want to look at apps like 'App Shopper' and put up a wishlist of Apps you'd like to buy. It will notify you of price changes and show the apps pricing history.
Tapatalk regularly has $0.99 discount for the base app for example. I recall actually seeing it diacounted just last week so it might still be cheap.
I personally still haven't tried - I still use Tapatalk natively in IOS. I like Google from a software standpoint. As far as hardware - it's tough to beat Apple.