Finally: a distortion correction app! Look at this picture from my office with original iPhone-lens
This is the same view with olloclip-fish eye:
Applied with the app for correction:
Pretty amazing. The app is available for FREE for a limited time @appstore, and is developed by the team behind "HiLo-Lens". This is a kickstarter-project that I've chosen to back with a couple of quids. Although the lens is not in production yet - i feel that the newsletter from them - pointing me to this app, was worth every penny.