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Pro Macro mode
Allows more close-up shooting of focused subjects than default iPhone camera.
Pro Manual controls
Manually adjust focus, as well as aperture, ISO, and shutter speed to a certain extent.
Pro Extensive editing suite
Lots of filters and other editing features (brightness, contrast, saturation) built in.
Pro Can save as lossless TIFF images and other high quality formats
Those interested in lossless formats will be able to save as a lossless TIFF. Alternatively one can save as more standard high normal or optimized quality JPEG formats.
Con Not free
Con Features presented as exclusive modes cannot be used together
For example burst is a mode, and so is the timer, but you can't do burst photos with a timer, or burst mode with a stabilizer. None of the following may work with each other in tandem: Normal, Stabilizer, Timer or Burst. This limits the functionality of the app, which may not be understood before purchase.
Con No HDR
There is no way to do HDR in this app asides from manually doing it yourself and processing it in a 3rd party app, which can cause alignment and ghosting as problems.
Con No panorama mode
There is no panorama mode offered in the app, meaning if that is a needed feature a different app will need to be used making this not an all in one solution.