Race buddy helps you measure acceleration from a standstill or while rolling. It can record video and overlay all your data (speed, temperature, G-force, the difference in altitude, etc) over your video and you can share it with your friends.
Supported external Bluetooth devices are RaceBuddy ONE (free), RaceHF Bean (PRO), Racelogic VBox Sport (PRO), Dragy (PRO), and RaceBox.cc (PRO)
*** Notice: This app requires RaceBuddy ONE or other devices. To buy one, go to www.rbuddy.io ***
Disclaimer: Always drive safely. The Race Buddy App is intended for off-road and track use only. Recorded information and displayed content may not be completely accurate. This is a learning tool only and its content is not intended for performance or high-risk driving. The author is not responsible for any injuries or property damage that may occur while using this software.
RaceBuddy App uses standard Apples EULA - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/