Where is the App, and how do I control the LED spotlights on QC3857 Nextech 1080p Battery Wireless IP Camera?

The QC3857 camera has several control options - an iOS Apple App (see here), an Android App (available here), and Windows PC software (available here).

You should install the App and create an account first.

The Apple app is installed via the Apple App store. The Android app should be downloaded to your phone, and then installed by opening the file (your phone may prompt you to allow it to install apps from outside the app store).

The Windows PC software has a facility to control the LED lights. Download and install the PC software. Open the software (IP Camera) and login with the same username and password you created in the Nextech app.

Once you log in, right-click the camera on the right of the app, and more settings are available.