Color Filter Lenses are not patented to the SLR cameras, you can also use it on your smartphone and iPhones.
With the specially made kits, you can use it on iPhone or any Smart Phones or even... iPad or tablets... no joke.
Here are the lens set:
for example, you can use a custom cover for iPhone:
for Samsung Galaxy Smartphone:
and here is the full set:
Here is a video for the FLD filter
Here is a video for the Blue Filter