What app can I use to add filters to my photos?

I have an iPhone and on Instagram I noticed @KylieJenner has cool red sunlight sort of filters and all sorts of light effects/filters. What app is this?

Just buy some coloured gels and place them in front of the camera lens.

Fotor-PES (photo effect studio) can offer your sort of sunlight filters, and more than that it has more special scnes to make your photo effects

totally more than 100 kinds of filters/effect, about Analog、Lomo、Neon、Rwtro、Art、Vintage、B&W、S… Picture

Now the app is Free, you can get the details at fotor.com