The Swimmo smartwatch is a personal device that you can wear every day; however, it is also possible to lend your Swimmo to another person. Before doing so, you will need to sync workouts on your account (to make sure they are saved) and reset the watch.
While the app and watch can work for two people, you should only share your watch with someone else for the purpose of a one-time use (e.g., your friend wants to test your Swimmo out). We don't recommend that you switch the watch between multiple users on a continual basis. To maintain the best user experience (time saving, easier to use) and to protect users from undesirable outcomes (e.g., data loss when you forget to sync before resetting), we recommend that Swimmo is used as a personal device.