Unfinished Crap App

Like others have reported, this app offers no means of saving your billing cycle date data. After selecting in setup, only way to exit setup is kill app. Looked very promising, layout and display very friendly. My guess software engineer decided to offer it as iphonegiveawayoftheday app knowing it was cow dung quality. However, if your tired of waiting for hot water at sinks and showers...check out ReadyTemp.com for a simple DIY install takes all of twenty minutes.

YW84HOTWATER REDYTEMPDOTCOM about Data Master - Monitor Cellular & Wifi Data Usage, v2.16