App or filter to make my pictures look low quality?

I know it's the opposite of what most people want but I have a fan account on Instagram that I post low quality pictures on but I would like to be able to make some of my own. I'm on an iPhone So please comment apps and filters that would help!

If you mean low quality on a technical level, you can all but guarantee low quality pictures from an iPhone by shooting it in very low light situations. The sensors in those things are small, and really need decent light to shine. Using them in low light will guarantee blurry, noisy, terrible looking photos.

If you want low quality pictures in normal light, intentionally move the phone when shooting, and you will get blurred pictures. Also, if this is possible (never used an iPhone) set the picture quality to the lowest possible level.

If you mean low quality in an artistic sense, then just shoot whatever you see without any thought of composing it.

Images from a phone are already low quality.