Is there a method to queue a new app for installation from Google Play, so that it downloads later when the phone connects to WiFi? The point being to save mobile data.
For an update to an existing app, you just have to enable that in Google play's settings. For a newly installed app, I don't think it is possible. You can block the background data for Google play, but that's just a workaround and it has limitations like you won't be able to make in-app purchases when you are on mobile network.