Yes, they're shot with the instagram 'camera/filters'.
Are these photo apps you can download?
Yes.
Just as a general observation (I don't know that you are Mantis, but I suspect you could not have escaped knowing about these things otherwise), I've noticed those who are reluctant to embrace social media miss out on so many important trends that affect advertisting (and so what we should be shooting & how we do it) Downloadable apps like Instagram, Hipstamatic and Snapseed have been shaping how the majority of under 30's in the developed world communicate now. Hence my desire to quote Stocktastic above. Of course it's a fad, there'll be something different soon, but currently this is what people with products that they want to sell to people under 30 want.