Since I will be lending my phone to someone else, I want my phone to ask my Google account password (or alternative authentication) each time an app is installed.

If I go to Google Play -> Three bars menu -> Settings -> Require authentication for purchases, the options are:

  1. For all purchases through Google Play on this device.
  2. Every 30 minutes.
  3. Never.

The first option seems to be what I am looking for. Nevertheless, I am not asked for any authentication for installing apps.

Can this be done? How?

Using a Samsung Galaxy J7, with Android 6.0.1.


Apps that are free don't have to be purchased -> no purchase means no password prompt.

I see two possibilities for you:

  1. Delete your Google account from the device. Google apps usually sync everything to the cloud, therefore by re-adding the account everything will be restored.

  2. If the device has the possibility to create a guest user account set a difficult password on your primary account and create a guest user. Guest users aren't allowed to install new apps, however they can use every app that is already installed and the app data is stored in a separate directory therefore the guest can use the apps but don't access your app data.

  • I understood that "purchase" included apps, regarded as being of zero cost. I never tried purchasing a non-free app, so I cannot confirm I am seeing the expected behavior in that case. – sancho.s ReinstateMonicaCellio Apr 16 '19 at 0:27
  • No, have a similar problem, my 5 yr old son grubs it when i turn around and by the time its locked 10-20 "free" apps have been installed... – ntg Sep 15 '20 at 6:50

A bit extreme, but consider that Google will not allow you control over installations...

Disable google play.... It wont be uninstalled, and can be re-enabled from settings, but its one more extra step at least...

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