Tap (profile picture) in the top-right corner of the screen.
Select Manage apps & device → Manage.
Select Shedevrum in the list.
In the top-right corner on the app details page, tap the backgroundLayer 1.
Check the Auto-update box.
iOS
Go to your device's settings.
Find App Store.
Under Automatic downloads, turn on Apps and App updates. Apps will be updated automatically. If you don't want to use mobile data, under Cellular data, turn off Automatic downloads. Apps will only be automatically updated when the device is charging and has an active Wi-Fi connection.
Uninstalling apps on iOS may be blocked by the built-in restriction system. To remove the restriction, go to Settings → Screen time → Content & privacy restrictions → iTunes & App Store purchases → Deleting apps and set it to Allow.