1. Fitbit Charge 6 Fitness Tracker
Fitbit
Best overall for swimmers who want both pool lap tracking and a usable open water distance estimate. The highlights are pool swim mode logs lap count and pace reliably in a standard 25-meter or 25-yard pool and built-in GPS gives a usable distance estimate for open water swims. One caveat, stroke type recognition occasionally misclassifies technique drills.
- 50-meter water resistance
- Dedicated pool swim exercise mode
- Built-in GPS for open water sessions
- Heart rate tracking through water
- 7-day battery life
Pros
- Pool swim mode logs lap count and pace reliably in a standard 25-meter or 25-yard pool
- Built-in GPS gives a usable distance estimate for open water swims
- 50-meter rating handles both recreational and lap swimming without concern
- Heart rate readings continue underwater, unlike some optical sensors that pause
Cons
- Stroke type recognition occasionally misclassifies technique drills
- Touchscreen is unresponsive underwater, so controls need to happen poolside
- GPS accuracy drops noticeably in open water compared to land-based runs
Best for: swimming



