Marketplace
This is one absolutely beautiful Android App. The link will take you to the download and give you access to the pro version for a week (from memory), open settings and select upgrade to pro to pay $0.99 through google checkout.
You can use the free, ad supported version for as long as you want, but for $0.99, the pro version is well worth losing the ads and getting some additional functions.
The number transitions/animations alone, are worth the 99 cents.
Great app, have been using it for months.