My iPhone 6S doesn't fit into the old 4S phone holder that I had on the bike. Not wanting to buy an updated holder for an old iPhone 6S, I decided to design up and 3D print a holder. This is the quick design I created for it:
While I designed up a top for the holder that clicks into place, I found that the iPhone fits quite firmly and will not bounce out, so the top section isn't needed. Here is the front view:
and the back view. You can see the two clip in notches in the back:
There where a couple of small improvements I have implemented, but not enough to bother printing out a replacement.