One of the things iOS is great at is helping people collect data -- there are apps and hardware that help track everything from fitness to finances. Now, Robocat is adding temperature to that list with Thermodo ($30-$45). Available in black, red, or white aluminum, or anodized aluminum as a premium edition, this accessory plugs into the headphone port of a compatible device, and works with a companion app to display the temperature in real time. When…