Click the "x" button in the upper-left of the Mac App Store app icon you want to delete.
Note: If you do not see an "x" button, either the app is not from the Mac App Store or you are logged in as a standard user. read more
For permanently delete your app follow below steps. Step 1 :-GO to My Apps App in iTunes Connect . Here you can see your all app which are currently on Appstore. Step 2 :-Select your app which you want to delete.(click on app-name) Step 3 :-Select Pricing and Availability Tab. Step 4 :-Select Remove from sale option. Step 5 :-Click on save Button. read more
Just go to the App Store and look for “Updates”, click on the avatar button at the top to enter your App Store account. Under your App Store account, click "Purchased" to view your purchased apps. You can select “All” tab to see all of the apps, and swipe your finger from left to right of the screen over each of the apps you want to hide, a Hide button shows up and you just click it. read more