Here is another tool that helps you take shake-free video with your smartphone. The Steadicam Volt Smartphone Stabilizer has a lightweight, folding design. It has dual operating modes (sport, movie) and can accommodate phones up to 200g in weight.
The Volt has up to 8 hours of battery life. It has Bluetooth and works with iOS and Android devices. The Volt keeps your smartphone steady even when you are moving it fast. Expected to ship in June.