Asset Store Deals is an unofficial app that lets you quickly check what is the current 24-hour deal on the Unity Asset Store. You will see the name of the package, the normal price, the discounted price and the percentage of discount, also the description. And if you're interested, you can buy the package (this process will be handled outside the app on the Asset Store's website)

It also works as a Today Widget.

Don't forget to rate the app if you find it useful, thanks!