Google is always ready to help even before you ask for it. Recent reports from AndroidPolice suggest that Google is testing a new feature in its Play Store to help you never miss on downloading an interesting new app and save mobile data in the long run.
The app store in Android usually prevent large downloads from starting without your express permission on mobile data, but now Google is testing a system that lets you queue these downloads for the next time you're on WiFi.
The ‘queue’ feature is currently in beta and is showing up for only a group of select users. According to these users, the app download now doesn’t directly start on tapping the install button, but instead they’re being presented with an updated dialog box — while on mobile data. The new pop-up dialog box lets the users download the application right away or choose the ‘Wait for WiFi’ to queue apps for downloading, the moment you connect to a WiFi network.
The Play Store client has a warning that this feature is still in testing. If Google removes it, queued apps might download on mobile data. Earlier larger downloads dialog only showed the warning when you tried to download apps larger than 100MB, but the queue seems to work with smaller download sizes as well.