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.
You can purchase AppETA from the Cydia Store for $0.99.