Which health tech has significantly improved the quality of your life?

With all smart HW devices (Aura rings, Smart watches) and software (exercise apps, step counters, calorie trackers), we can prevent serious diseases.

Which new technology has significantly improved your health and lifestyle?

I have to admit that I don't use many of these devices (apart from pedometers), but, for example, I came across an app that can detect hair loss early by analysing scalp images. I found it quite interesting and useful.