Basic rotor balancing so called in-situ balancing can be performed even with simple, single channel vibration meter. It is very easy with Adash Balancer. Get a vibration meter (such as A4900 Vibrio from Adash) and get down to work with this App!
Additional app possibility is to do balancing without vibration meter. Now you really don’t need any vibration meter. Your smart phone has simple acceleration sensor already and we are using them for taking the readings during balancing job.
Please take this app as an emergency option for balancing. The mathematics behind it is unquestionable, but to do balancing with the smartphone is far far away from precision which you can get while balancing with Adash vibration analyzers such as VA3Pro or VA5Pro.