I have the Inspire 2 and have had really good luck with it. It has a waterlock feature, which I have not used for swimming. But I can attest to it holding up to sweat. Lol.
The Inspire was less expensive than my other Fitbits and I like it better for how I use it. It did come with free premium - for one year- which I use on occasion for info and for meditation. I have it synced with my android phone.
"What we practice daily is what we build a life on. Practice peace, love & kindness."