I'm a fairly active person and some days my steps as counted by my iPhone's Health App can total twenty-five or thirty thousand. On these especially big days the app has the annoying habit of randomly reducing the number of steps counted.

You know you mentioned that both of you use the same Apple ID (iCloud account). That is causing the overlap of data between the two of you. The health app is using data from one or the other and reporting to both iPhones (among other things). The ideal way of setting your iPhones up is to use two separate Apple ID accounts and use the ➔ Family Sharing feature to share information.

Axel F.

Are you using any third-party apps that counts your steps and is connected to the Health app as source for data? The reason I am asking is that if you have more than one apps taking count then, perhaps, at times, one app is taking precedence over the other and reporting the data to the Health app.

For optimum accuracy, I recommend that you purchase a wrist based device (Apple Watch, Fitbit etc) that keeps account of your activity and reports it accurately to the Health app of your iPhone.

Axel F.

I'do what she does.

Axel F.

You are welcome.

Axel F.