I would like to share my experience with this Databack application.
I installed this application in my phone last 2 months. The conecpt is very good. in this application you can save your internet balance with the use of other application. in this application you have to install recommend applications in databack because when you use that applications which are listed databack application. when u start using listed apps this databack start saved your internet usage in Megabytes. when you reached limit of 150MB you can use this to recharge your mobile data and its really worked. until now I recharge 300 MB in my phone. the feature of tracking your apps data it would help to know how much data can used by applications. I recommend to use this application, it is very useful.
Thank you