The Smooth-4 Smartphone Stabilizer from Zhiyun-Tech has beendesigned to provide cine-style functions to content creatorsusing their mobile phones for video capture. When used with thefree, downloadable ZY Play app, the control panel enables Androidand iOS users to control both gimbal and smartphone camerafunctions such as focus, zoom, time-lapse, and still photosettings. The Smooth-4's controls reduce the need to touch yourphone's screen, thereby minimizing unintended jostling whilerecording. A dedicated "Vertigo" function emulates theperspective-shifting, dolly/zoom effect dear to many filmmakers.Compared to the ZT Smooth-3, the Smooth-4's controls are moreergonomically laid out and better labeled with icons. TheSmooth-4 also has a significantly larger focus/zoom wheel, aPhoneGo mode for quickly grabbing the action, multiple time-lapsefunctions, and object tracking. With the ability to supportsmartphones weighing up to 7.4 oz and measuring up to 3.35" high,the Smooth-4 is compatible with almost any mobile phone.