RPM - Fidget Spinner Speed Meter by Konstantinos Vogiatzakis
38000 RPM Fidget Spinner! World Record! - YouTube
Fidget Spinner RPG android iOS-TapTap
Amazon.com: Super Precision Gyroscope - With free quickstart 12,000 rpm electric motor starter, spinning top dynamically balanced toy (gimbal kit not included) : Toys & Games
99999+ RPM Fidget Spinner Toy //Cause I Can - YouTube
Win the Challenge: How Can You Tune Your Fidget Spinner?! - Hackster.io
RPM - Fidget Spinner Speed Meter on the App Store
The Physics of Fidget Spinners | WIRED
Fidget Spinner Tachometer, an app for your spinner:Amazon.com:Appstore for Android