AppETA cydia tweak allows you to see almost any information about downloading application, such as size, time etc.
That’s not all! You can also choose between different ways of seeing downloading progress, and you can combine for example iOS 6 style progress with iOS 7 default progress. Or just add a label on top of downloading application which will display size or percent, as you will. Additionally it’s possible to change label and classic progress color from preferences. Also there is an extra option called Alarm ETA, which will replace useless “Alarm” text to estimated time remaining, just like on Android. Just double tap on downloading icon to present alert with all information.
There are two alert styles, white and dark, you can switch between them from Preferences. You can see alert in screenshots below.
Configure options from Settings.