So you would like to capture even smoother shots with your iPhone? The CINEPEER iPhone gimbal has you covered. It is a 3-axis stabilizer for iPhone and Android devices in addition to action cameras. It fits smartphones under 6″ and lets you control filming using its iOS/Android app.
The Cinepeer C11 3-axis gimbal stabilizer is great for 180°/330°panoramas. It can automatically track objects to capture point to point motion. The device runs for 10 hours.