The best bitcoin app and widget that i know is the coins. ph in coins.ph you can store your bitcoin and at the same time your money can grow faster and bigger. Your money can multiply in so many times. Example is when you invite a friend is you can get 50 pesos in change of the activity that you did.
I don't understand why it can make your money grow faster, it's just the price of bitcoin changing and that's how it grows but not the app itself. It's the users' strategy on how he or she will use his funds to propagate and make their money grow. That's a great thing to do, invite more people to the Bitcoin community.