The Milestone Pod is a low cost device that is clipped onto your running shoe, that collects data as soon as it senses movement. After your run you simply sync the data from your Milestone Pod to the MilestonePod App on you Android or iOS device.
I’m not a runner, but luckily my girlfriend is … and she is using a Garmin Vivofit HR in combination with a Wahoo Tickr Run heart rate strap. The Milestone Pod is perfect for use on treadmill in the basement, where GPS reception is less good.