Google launched its data-tracking app Datally for Android last year, giving users more insight into how and where they're using their phone plan data as well as more control over that usage. Now, Google has released a handful of new features for the app. First up is Guest Mode, through which Datally users can set the amount of data someone can use when borrowing their phone. And in that same vein, Datally now lets you apply daily data usage limits for yourself. The app will give you warnings as you approach that limit and once you reach it, you can either block data for the rest of the day or continue using it.