A free program for Android, by Syrupy.

The Camera Lock – Phone & Tablet Camera Security App allows you to lock your devices’ camera. It can be used to protect your devices when you are not around.

It allows you to lock and unlock your devices by using the PIN code. You can also set it to only allow access when you are using your devices.

You can also set it to allow access only to a specific app. It will then ask you for the PIN code if you want to use the app that you have just locked.

The app is easy to use and will not require you to do anything else but enter the PIN code.