Changes

The Spartan works with the various Bluetooth heart rate monitors I tried, including the Polar H7, [[Wahoo TICKR Run]], and Suunto's own heart rate monitor. I found the heart rate monitor that is optionally packaged as with the Spartan worked fine, though I've generally used the Wahoo as I can get the heart rate data on any Ant+ watches I'm also using. The Spartan is unique in supporting the [[Stryd]] footpod, a [[Running Sensors| Running Sensor]] that will transmit "Running Power." It's nice to see these new Running Sensors supported as first-class devices, but theresadly Suunto messed up their implementation. The Spartan Ultra will always calibrate a footpod against GPS, so the footpod can never be better than the GPS accuracy. In theory you could always run in indoor mode, or with GPS accuracy set to less than "best", but that's an approach that's no support for calibrationlikely to go wrong at some point. To compound the problem, so the Spartan wonneeds to pair with the Stryd as both a footpod and a power meter, and it can't work with other Footpodsdo both at the same time due to Bluetooth limitations. So, you can get a power estimate from Stryd, but Stryd's ultra-accurate pace/distance information is inaccessible. The Spartan has an internal accelerometer that will give a reading for [[Cadence]] without a [[Footpod]], and I'd say this is broadly adequate but far from perfect. One annoyance is that the Cadence from Stryd is twice that from the internal accelerometer, and the Stryd Cadence data seems to be rather noisy. I tested the Spartan with the Polar Stride Sensor and the Adidas footpod and they transmitted pace and cadence information. However, there's no facility for the auto calibration of a Footpod which limits the ability to use these devices. (In theory, the Stryd Footpod is accurate enough that it doesn't require calibration.)

You can either sink sync the Spartan using a USB cable to a computer, or over Bluetooth to the smart phone app. I found that syncing to the smart phone app has been a little patchy, and I generally rely on the PC app.

[[File:Spartan HRV.jpg|center|thumb|500px700px|HRV from the Spartan in RUNALYZE]]