Looking to find the best fitness tracker or sports watch for swimming? The best tech to track your laps, strokes and swim fitness. Apple Watch 3. Caters nicely for casual lappers. Moov Now. Best option for swim-fitness on a budget. Garmin Forerunner 935. The most powerful multisport watch yet. Samsung Gear Fit 2 Pro. Fitbit Ionic. TomTom Spark 3.