While its no Photoshop replacement, this app is superb for on-the-fly editing. If you want to send a spur-of-the-moment photo to friends or your favorite social-networking site, or want to post to your blog while traveling, this app will deliver pleasing results.
I had to decided whether to choose an app with more manual features, or something like PhotoFX which is filter based. At the end of the day, filters were the right way to go. You soon get used to what kind of results to expect from the various filters, so that you dont have to rely entirely on what you are seeing on the screen, which is extremely useful when you are editing in daylight. There are so many filters packed into this app that, if you do decide to go the filter route, then choosing PhotoFX is a no-brainer.
My iPhone is has never frozen while using this app, even when Ive created several layers of filters. However, I do usually set smaller aspect ratios because I do mainly use this for sending photos to Facebook, so higher resolutions are superfluous. All in all, worth every penny...
Neil Mullens about Digital Film Tools