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by meowzero 1921 days ago
In terms of inaccurate sensors, all of them have inaccurate sensors. They are all taking an educated guess. If you need accurate sensors, you have to buy dedicated sensor for what you need (heart rate, oxygen, etc).

It also depends on what you value. I use a Fitbit because of the sleep data and the long battery life, where I don't have to charge it every day.