There is smartapp supplied with the regular ST mobile app, in the green living section, which does compare two temperatures. But I don’t know if it works with those particular devices.
The following is current as of Sept 9, 2015. This is a list of the officially approved SmartApps that are available for installation through the SmartThings mobile app under the SmartApps tab. In each category, you will find a combination of community contributed & SmartThings developed SmartApps.
To install any of these, open the mobile app, select the Marketplace icon ([image]), and select the SmartApps tab.
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