Download ADB https://dl.google.com/android/repository/platform-tools-latest-windows.zip
Extract tools;
Enable USB debugging;
Connect phone in file transfer mode – “Transfer files”;

C:\adb>adb devices
List of devices attached
* daemon not running; starting now at tcp:5037
* daemon started successfully

C:\adb>adb devices
List of devices attached
9WV7N18302039512 device

Use pm to list packages:
C:\adb>adb shell pm list packages

Display where .apk file is:
C:\adb>adb shell pm path com.webcodelab.naszedrinki
package:/data/app/com.webcodelab.naszedrinki-s1vmL5z9VyE4LQSYa7uxXw==/base.apk

Use adb pull to download .apk file:
C:\adb>adb pull /data/app/com.webcodelab.naszedrinki-s1vmL5z9VyE4LQSYa7uxXw==/base.apk
/data/app/com.webcodelab.naszedrinki-s1vmL5z9VyE4LQSYa7uxXw==/base.apk: 1 file pulled. 21.6 MB/s (8967231 bytes in 0.396s)