The Philips 40PFS6009/12 TV runs on the TITAN OS smart platform, which supports various smart TV applications. However, the specific availability of the zattoo app depends on the region and the app store available on the TV.

To check if zattoo can be installed:
1. Check App Store: Go to the app store on your TV (usually accessible through the smart TV menu) and search for "zattoo."
2. Region Availability: Ensure that zattoo is available in your region, as app availability can vary.
3. Installation: If zattoo is listed in the app store, you can download and install it directly from there.

If zattoo is not available in the app store, it may not be compatible with this specific TV model or may require a different installation method, such as sideloading, which is generally not recommended due to potential security risks.