HT201493: About Find My Friends
Learn about About Find My Friends
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Helpful answers
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Apr 27, 2013 1:27 PM in response to blaze24311by Christoffee,Anything that uses 3G and GPS will have a noticeable impact. But in my experience when someone is looking for you it's quite respectful of battery usage. If you are looking for a friend that can't be found, it's more noticeable.
This is only anecdotal evidence though.