Countdown app

I simply want an app that will let you input a time and date then the app will tell you how long it is until the time you set. I would also like there to be 5 options of display for how long it will be , firstly something like 34 days 5 hours 32minutes 17 seconds , that sort of thing then an option to display exactly how many days it will be , how many hours it will be , how many minutes it will be and how many seconds it will be till the time. I would like these options to be changeable on each individual [login to view URL] i would like the app to have multiple countdowns. Also i would like you to be able to set a picture from your iphone/ipad as the background. I may add more later on but this is what i want to start with :)