HealthKit to detect that a person is in trouble

I would like to leverage ios's HealthKit to write a watch and phone app that would detect that its user may be in trouble (fall/shock).

I do not want to gather the various sensor data myself because it would not work if the app is closed or the phone restarted. I see HeathKit as a mean of access to the store always available.

Today I have an android app working with a service (always running) that uses the accelerometer/GPS and bluetooth to achieve the same goal and triggers the app to connfirm the problem.

Am I going in the right direction? It seems that the accelerator data is not available in the HealthKit.

Do you think App Review would approve such an app?