Rowan Simpson of Southgate Labs made an iOS app, Top Three, which does this a few years ago http://itunes.apple.com/nz/app/top-three/id377629136?mt=8&ign-mpt=uo

Rowan Simpson of Southgate Labs made an iOS app, Top Three, which does this a few years ago http://itunes.apple.com/nz/app/top-three/id377629136?mt=8&ign-mpt=uo%3D4 http://itunes.apple.com/nz/app/top-three/id377629136?mt=8&#3...