The new TgForce 3D sensor is now available. It took a long time to finalize, but the new sensor provides better accuracy by sampling each axis at a significantly higher rate (1600Hz).

It is also smaller and lighter than the previous sensor. Apple has recently approved the new TgForce 3D iOS App and it is updated with multiples fixes and new features. 
You can now check the acceleration of each axis when running, and the magnitude of the 3D vector is also calculated. 
The iOS App is currently fully updated for iOS 11+ 
The web site and the user guide have also been updated with the latest information.