Free really good photo editing apps for iPhone 5?

I want get my pictures to look like this
http://ifweturnedbacktime.tumblr.com/image/61273956068
What are some free iPhone apps to get that grunge pale look in my photos.
If you know any apps I have to pay for, please tell me, that's alright too.

Artstudio's really good but it costs money.

PIXLR! OMG IT IS THE BEST! IT WORKS Really WELL, GIVES A LOT OF DIFFERENT PHOTO EDITING OPTIONS AND IT'S FREE!

it also works without Wi-Fi or data, but you need to be connected to them to download packs (eg; filter packs) but all packs are free!

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