Kiplin uses the data recorded by your Health app
1. I have steps in my Health app
In your Health app settings, under Privacy > Apps: check that Kiplin appears (Kiplin not appearing? Go directly to Kiplin and follow the steps to unlink/re-link your sensor).
Click on Kiplin and select at least Number of steps
Return to the Kiplin app, on the home page click on your name in the top right-hand corner (profile) > my sensor and perform the operation to unlink/reconnect your sensor.
2. I don't have any steps in my Health app
In your iPhone settings, tap Privacy, then Movement and Fitness.
Check that Fitness Tracking is enabled.
Authorise Health.
Return to the Kiplin app, on the home page > tap your name in the top right-hand corner (profile) > My Sensor and perform the operation to unpair/repair your sensor.