With the introduction of iOS 8 came new developer APIs allowing apps to have exacting control of several camera adjustments, including exposure, focus, and shutter speed. Manual is a photography app that implements these new freedoms in a beautiful package, granting users full control of their photos.
I went hands-on with Manual for a few days, venturing into my highly "unphotogenic" yard in an attempt to gather a few decent shots with both Manual and iOS's stock Camera for comparison to see exactly how much of an advantage the ability to manually adjust camera settings can give.