How to Stop Apps Updating Automatically in Google Play
1. Open Google Play and swipe out the navigation drawer. Choose Settings.
2. In the Play Store settings, tap Auto-update apps.
3. You’ll see three options (which can be changed at any time): Do not auto-update apps; Auto-update apps at any time. Data charges may apply; and Auto-update apps over Wi-Fi only.
4. Choose the first one. Note that this means you will always need to manually update all apps in the future. If you still want apps to update automatically, just not on your data connection, select Auto-update apps over Wi-Fi only.