In some circumstances, getting a clear shot with your iPhone is a little more challenging than with a regular camera. I recently learned (ok, months ago) a bit of insight that can help get clear pictures with the iPhone.
When taking pictures with your phone, remember that it snaps the picture when you take your finger off the virtual button, not when you tap it down.
Undoubtedly that's by design because when you first press your finger to the screen you're likely to shake the camera ever so slightly, but that's all it takes to ruin any picture.
BTW, this also worked with all Android devices we tested.
For full details, check out geekbeat.tv/tip14