The Duchess of Cornwall, 74, and her husband Prince Charles reportedly have a very healthy lifestyle at their country home in Gloucestershire.
The tool allows you to keep in shape by tracking the movement.
Fitbit sells the fitness feature online with the cheapest one being £49.99.
However, similar ones can be found on Amazon for just £28.
The 74-year-old Duchess was spotted wearing the gadget while visiting Egypt and Jordan.
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Camilla had previously revealed she tried ballet with a group of other over-50s during lockdown to keep fit.
She also explained she practices a “bit” of yoga and Pilates.
Camilla said: “It’s very good for you.
“It makes you much more supple.
Camilla also said that she tries to get as many good fats in her diet as possible.
Good fats are foods such as avocados, fish and almonds.
After being offered an avocado during a trip to Singapore, she explained how “essential” it was to be “eating in the most healthy way”.