What filter is this?

Question

Does anyone know what filter/app is used to get that slightly grainy filter that everyone has been using lately? 
It's very subtle but if you zoom in on her arm you can see.

Answer

I think the picture had just been sharpened. On Instagram when you're choosing what filter to put on your picture, go on edit and somewhere there it will say sharpen.

Answer

You can add grain to a picture by using the "sharpen" feature on most any app. It's on instagram as well as InstaSize, PicsArt, EditLab, etc.

Answer

PS express - grain filter. You can adjust it depending on how harsh you want the graininess.

What filter is this?

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