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A comment on Show HN: From an idea to the Valley in less than a month. Parent comment

Re:Show HN: From an idea to the Valley in less than a month by ethyreal on Tuesday October 09, 2012 @09:43AM (#4631428)
it seems like all you have to do is convince you friends to install the app and set locations / status they want to share and the app ( uses geo fencing ? ) updates the status for them and you when they enter those areas.
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