Capture screenshot by holding the Home button.

Features:

• Crop screenshot to the desired size
• Save screenshot to the device
• Share screenshot with your friends

Make sure battery optimization is disabled for Screenshot Assistant:

Huawei:

• From the Home screen navigate to Settings
• Open Advanced Settings
• Open Battery Manager
• Open Protected apps
• Activate the app protection for Screenshot Assistant by pressing on the switch from the right side

How to configure the app:

• From the Home screen navigate to Settings
• [select] Apps
• Press Settings icon in the upper right corner
• [select] Assist & voice input
• Press Assist app and [select] Screenshot Assistant

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.