IPhone apps to edit images that minimally reduce image quality?

If I transfer photos from my Olympus em10 camera to my iPhone and edit them, they generally lose quality (understandably). I was just wondering whether anyone knew of any apps which I could use to reduce this?

Phones and tablets (iOS and Android devices) are not suitable for editing full resolution images. They don't have enough processing power, don't have enough memory, and images are rescaled for use on mobile internet connections so that they upload and download faster. You are using the wrong tool for the job.

You need to use a computer with proper image editing software, like Adobe Photoshop or Lightroom (not free) or the free open source image editor GIMP http://www.gimp.org/...w.gimp.org - all three work on Windows and Mac, and additionally GIMP also works on Linux.

Use the computer instead.

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