Why can I not synchronize/delete a product? Follow You must be connected to the Internet to add or delete a product through the APP. Was this article helpful? 0 out of 2 found this helpful Have more questions? Submit a request Return to top Related articles Why do I have to turn on GPS to use the app? How many users can use the Terraillon bathroom scales? R-LINK - Synchronization Why do I have to provide my weight, height and waist size when creating my profile? List of compatible smartphones. Comments 0 comments Please sign in to leave a comment.