How do I make my app using camera app of third party instead of device default camera?

I want to use an application "Open Camera" in my application designed in app inventor 2 to click photos instead of device's default camera. How to do this?

Which third party app? And how do you know that users have installed this app?

Actually i developed this app for our sugarcane firm
And we are using that app named "open camera"
We want from our app that it should ask that which camera do you want to open

Use the activityStarter to open other apps on your device