When comparing Polar H10 Waterproof Heart Rate Sensor vs Garmin HRM-SWIM, the Slant community recommends Polar H10 Waterproof Heart Rate Sensor for most people. In the question“What are the best fitness trackers for swimmers with heart rate?” Polar H10 Waterproof Heart Rate Sensor is ranked 1st while Garmin HRM-SWIM is ranked 2nd. The most important reason people chose Polar H10 Waterproof Heart Rate Sensor is:
It's water resistant up to 30m, allowing you to use it on deep diving pools.
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Pros
Pro It´s fit for deep pools
It's water resistant up to 30m, allowing you to use it on deep diving pools.
Pro It stores full and detailed heart rate data
And all the data is shown in a chart, including workout time, calories burned, fat burned, max and average heart rates.
Pro Long battery duration
The battery has over 400 hours of operation time.
Pro GoPro Compatibility
You can pair it to your GoPro Hero 5 and show your heart rate data onto your recorded video.
Pro The app can be used with any smartphone
The Polar H10 does not need a special watch to sync, and that is a big plus.
Pro Its specialized straps are resistant to pool chemicals
The normal straps of other products not specifically designed for swimming won't last when swimming 5 days a week for months. This one will endure that kind of training with no problem.
Pro Easy to use
There are a lot of youtube videos that explain how to pair the device and use it.
Pro Garmin will replace your strap if it gets worn out
Cons
Con No ANT+ connectivity
ANT+ is used to talk to several fitness sensors, and having no ANT+ connectivity isolates you from a lot ways that you could use your H10 to interact with other fitness devices.
Con No live monitoring
Most digital trackers can't transmit while in water, and this one can't either.
You will have to wait until you are out of the water and the file gets synced with the watch to analyze your performance.
Con You must have a Garmin compatible watch to use this strap
The strap is only the sensor, you must also own a FR920XT/Epix/Fenix3 to be able to download the data it collects. It won't work with watches from other companies that are usually able to download data from the straps either.