This page will allow you to connect your strava account to KMS. This also means that KMS will have access to your activity data. The data will be copied to the KMS database and processed on the KMS server. If you don't want that to happen, do not connect your Strava account.
However, if you do connect, we promise not to sell your data and only use it for showing visited tiles on KMS. You can also disconnect strava at any time and that will delete all your data.