Samsung Galaxy Watch7 Bluetooth (44mm)

Falsely advertised, badly designed, fails at basic reading. The website advertising said it could monitor sleep apnia. I spent quite some time reading a range of incomplete documentation to get this working. The function simply does NOT exist on the watch. I eventually discovered some small print on the website which says. "Not all features available in all regions". This function seemed simply falsely advertised in Australia.

I assumed the same applied to it's "VO2Max" measuring, which also did not exist on my watch. But after months I discovered that when I configured the watch for the best available GPS positioning, the menu option magically appeared. After a few days it started producing numbers.

Even though the above options do not exist initially on the watch, many options do exist but cannot be used. When you click on them it says these features only work on the Watch 8. Why add them to the menu at all?!??! Options that can never work are always in the menu system, and options that should work are not in the system at all. Silly design.

But worse, virtually every night when the watch measures my sleep, there are periods in which it measures nothing. These last from between 30 minutes to 4 hours. At first I assumed that the watch was saying that I was awake in the period, but later realised that it was simply not measuring at all - according the the watch - I had no heartbeat or breathing at all then (there are separate periods when it does measure me as awake). The results then are significantly influenced by this failure. I am wearing the watch exactly as per recommendations.

The algorithm also values the proportion of time in good sleep over the absolute time in good sleep. This means that I have slept for an hour total and gotten a sleep score of 47, and yet have slept for 6 hours and have gotten a sleep score of 32 - even though my total of deep/REM sleep was much larger in the 6 hour sleep night. This is a patently simplistic algorithm which delivers little value.

The watch's configuration and options are split between the watch and the TWO apps you need to manage the watch. Much time is wasted finding options. The documentation is poor - including that it actually mislabels the names of the required App Store apps.

This watch is badly designed, badly documented, has simplistic and poor algorithms and fails to deliver most nights that I use it.

It is astonishing that a company the size of Samsung could deliver something so poor.

UPDATE : I've been using my wife's apple watch to monitor sleep for months, because the Samsung watch was so poor. However I recently did notice that Samsung did a software update, so decided to try again. After the update, less things work. Previously working functions now display "no data" - there is no way to find out why there was a failure. Snoring detection, ECG and Sleep Apnea just do NOT work at all. For a while, the phone was locked in "Sleep mode" and needed to be restarted. The sleep analysis is very poor (days when I get less deep sleep or rem sleep, I can actually get a higher individual score for these!). According to the watch one day I went to sleep in less than 2 minutes (and yet sleep latency was recorded as poor????), AND yet on that day it only started recording my sleep 30 minutes later! It still misses large portion of my sleep.

This watch is dysfunctional.