This instructable will take you through the steps to create a simple way to mount your iPhone securely to your tripod for less $5 bucks. The best part about the clamp style mount, is that it will work with any kind of smart phones, and even works if you have a case on your phone.
What you Need:
Cheap plastic clamp ($1.00 walmart)
1/4 Coupling Nut ($1.50 Lowes or Home Depot)
1/4 bolt longer than your clamp is wide ($.30 Lowes or Home Depot)
about 10 mins
Keep in mind the entire video above was shot with this setup.