You can use the Fitbit Versa 4 to track swimming without needing to sync it immediately. The Versa 4 is water-resistant up to 50 meters, making it suitable for swimming, and it supports swimming as one of its exercise modes[1][4]. When you start a swim workout using the Exercise app, the watch automatically enables a form of water lock to prevent accidental screen interactions underwater[1][7].
The Versa 4 can track various swimming metrics such as swim lengths, duration, distance, and pace. These data are stored on the device and can be synced later with your phone or computer via Bluetooth when you have access to the internet[5][7].
However, to view detailed stats and summaries of your swim workouts, you will need to sync your Versa 4 with the Fitbit app. Syncing allows you to access additional features and insights into your swimming performance, which are not available directly on the watch without syncing[7].
In terms of offline functionality, the Versa 4 can record your swimming data without an internet connection. It will store this data locally until you sync it with your phone or computer, at which point the data will be uploaded to your Fitbit account[5].
Overall, while you can track swimming without syncing immediately, syncing is necessary to fully utilize the data and features provided by the Fitbit app.
Citations:[1] https://screenrant.com/fitbit-versa-4-waterproof-rating-explained/
[2] https://www.androidauthority.com/fitbit-versa-4-review-3223693/
[3] https://www.reddit.com/r/Swimming/comments/bsg68t/fitbitsmartwatch_for_swimming/
[4] https://www.pcmag.com/reviews/fitbit-versa-4
[5] https://community.fitbit.com/t5/Other-Charge-Trackers/How-does-the-watch-work-offline/td-p/1988469
[6] https://documents.4rgos.it/v1/static/1153729_R_D001
[7] https://support.google.com/fitbit/answer/14237015?hl=en
[8] https://www.youtube.com/watch?v=eiXVuSDijic