I have a free one thats pretty damg good, its called "package tracking". It looks like a orange newspaper box with a mail icon in front of it just so you can make sure its the right one.
It's a free version no need to buy anything else for it, it has tracking capabilities for all delivery services, usps, ups, fedex, etc etc, some that i haven't even heard of.
All you do on it is select the delivery service (usps, ups, fedex, etc...) and input the tracking number. Hit the search button and it brings up the package information. If you want to keep it tracked then hit the menu button and save it. It's really simple to use.
I was tracking a package today and it said it was delivered at my home at 1:06pm today, i checked the delivery service website, and it didn't even say that on the internet, so I think the application gets updates faster than their actual site lol.:icon_ banana: