The paper said the 2.99 pound ($4.65) app allowed it to keep close track of William as he flew in his capacity as a private pilot with East Anglian Air Ambulance in eastern England.It published photos claiming to show William's helicopter landing and of the prince himself.
The paper said Sunday that William's helicopter flies at low altitude at a relatively slow speed.
William's press office refused to comment on the report. The prince returned to work several weeks ago after paternity leave.
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