In design of a smartphone gimbal, more weight (mass) on the phone holder means less easy for the motors to rotate, more difficult to counter external disturbance, and higher current consumption.
Up until now, all gimbal designs have batteries separate from the gimbal arms and phone holder, reducing load of the gimbal motors, to allow wider working margin to accomodate larger external disturbance.
FlowMotion One's novel design has the battery located inside the phone holder, so that when the grip is detached, the gimbal can still work and can be mounted to GoPro mounts. Adding more weight onto the phone holder means reducing working margin, reducing ability of the gimbal to stabilize well under larger disturbance, especially for large and heavy phones.
Unlike campaign videos that viewers have no way of verifying if made up or not, if looking closely, this first 4 second in front of mirror demonstration (note 1) reveals true performance of FlowMotion One gimbal; some shakiness, still room to be improved. All other campaign videos are irrelevant unable to show real performance of the gimbal. If such video with some shakiness is expanded into a full 1 minute video recording, it would be unwatchable.
Without fundamental good stabilization performance, all other fancy features might not come useful. Many novel gimbal/stabilizer crowdfunding campaigns got sucessfully overfunded but with product failing to meet basic user expectation (note 2). Will FlowMotion One breaking away from conventional design considerations to creat a novel 3-in-1 handheld / wearable / extensible product have better luck? Will find out in April when it ships.
If not wanting to wait or take any risk, our $160 customer-proven ProView S3 that ships immediately might be a good alternative. It can even do a cinematic move that many $300 gimbals on the market can't. Why not check us out: http://bit.ly/1Pv1OvE !
note 1 : bit.ly/2hG0jwV (0:00 ~ 0:04, showing FlowMotion One vibration)
note 2 : bit.ly/2gqi4To