This app is good in features and provides some nice filters. Problem to be aware of though is it does not support images above 12m. So if there are images transferred to your iphone/iPad bigger than those taken with the device it will not support it. This is a bummer considering personal photo libraries from your computer are sync with iTunes and are easily greater in size. Other than this, not a bad app but. There are other apps that provides the same features with ability to edit any image. Look around.
DFlo about Big Lens, v1.0.1502.1