Tap on the Play Store icon on your mobile or tablet device
From the Google Play, tap on the menu icons (3-bars) on the top left
The menu will then appear, scroll down until you see the Settings. Tap on it
From the Settings screen, Tap on the Auto-update apps option under the General.
From the 3 options available, select "Do not auto-update apps".
Now you've learn how to stop Android apps from auto updating. We'll continue to the last step on how you can manually update the app. Tap on the menu icon again (refer to step 2). Select the option "My apps & games".
From my apps & games, it will list down all the apps and games you've installed on your mobile or tablet device. You can choose to Update All or manually updating the app by tapping on the Update link.