With all the focus surrounding the class-action lawsuit due to unauthorised charges accumulated through in-app purchases, Google has issued an update to the Google Play Store of which one particular added feature is the ability to set exactly when to be prompted for authentication.
The standard 30-minute window is still there as it always was, and you can follow this tip to set it, but now users can opt to be asked for the password in order to authenticate every App purchase and every in-app transaction.
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In addition, in-app purchases has also been added to the permissions window presented to users before they install an App in order to make them fully aware.
Google have also made some other changes in the latest Google Play Store update including mass-installing multiple Apps, as well as some user interface changes such as moving the settings icon into the main menu.
Some users may not see the Google Play update immediately as it’s being rolled out in phases, but users can force the update by tapping on the build number, or downloading it from this link and sideloading the APK.