Thanks to the in-app tracking feature, you can track your steps using your Android device if you don't have a Withings tracker. The only condition to use this feature is that you have to be the main user of your account.
To use in-app steps tracking, you must have Google Fit or Samsung Health installed on your Android device (Android 4.0 or higher).
To use the in-app tracking feature, perform the following steps:
Open the Withings App.
Go to your Dashboard.
Tap on Activity.
Tap Activate now.
Your mobile device will then start tracking your steps.
You need to log out of the application and then log back in to de-activate the in-app feature.