Robert F Kennedy Jr wants to fit all Americans with a tracking device within the next four years.

The Health and Human Services secretary revealed his plans during a House hearing yesterday, saying the devices — like Apple Watch, Fitbit, Whoop and Oura ring - were 'key to the MAHA agenda'.

He said the technology could help people lose weight and exercise more regularly, as well as 'take control of their health' and encourage 'good judgements about their diets, about their physical activity, about the way that they live their lives.'

In an effort to get a smartwatch, ring or monitor on every American, RFK Jr said he is planning to launch 'one of the biggest' advertising campaigns in history to encourage more people to wear the devices - which range from $99 to nearly $800.