You should not wear your Fitbit Versa 4 in hot tubs or spas. Fitbit explicitly advises against using their devices in hot tubs or saunas due to the high temperatures and potential water jets, which can compromise the water resistance of the device[4][9]. The Versa 4 is water-resistant up to 50 meters, making it suitable for swimming in pools or fresh water, but it is not designed to withstand the conditions found in hot tubs or spas[2][8].
While the Versa 4 can handle shallow water activities like swimming, its water resistance can be affected by factors such as drops, exposure to chemicals (like soap or sunscreen), and high-velocity water[2]. Additionally, the device's seals may deteriorate over time, which could further reduce its water resistance[5].
For optimal use and longevity of your Versa 4, it's best to avoid exposing it to hot tubs or spas. If you do use it in water, ensure it is in fresh water and clean it afterward with fresh water and dry it with a lint-free cloth[5].
Citations:[1] https://fitstraps.co.uk/blogs/news/is-my-fitbit-waterproof-everything-you-need-to-know
[2] https://screenrant.com/fitbit-versa-4-waterproof-rating-explained/
[3] https://www.villasport.com/the-woodlands/about/club-rules
[4] https://www.livescience.com/fitbit-versa-4-review
[5] https://community.fitbit.com/t5/Versa-4/Is-my-Versa-4-waterproof/td-p/5435582
[6] https://masterspascdn.com/documents/_manuals/legend/2024-legend-series-owners-manual-INT.pdf
[7] https://www.zenbathworks.com/shop/ht-round-4/
[8] https://store.google.com/us/product/fitbit_versa_4?hl=en-US
[9] https://community.fitbit.com/t5/Versa-4/Versa-4-water-proof-for-swimming/td-p/5446406