The Pro version offers a clean, uninterrupted interface.
Your Android device must support "On-The-Go" hosting. You can check this using an "OTG Checker" app from the Play Store.
Use a trail camera or a long-lens webcam to observe nature without disturbing the environment.
Connect a USB Endoscope or Borescope to inspect pipes, engines, or tight spaces directly from your phone screen.
Many sites offer "free" Pro APKs that are bundled with malware. It is always safer to purchase the app through the official Google Play Store.
Some Pro versions allow you to record even when the screen is off or the app is minimized.