IOTA Viewer was designed to visualize messages generated by IOTA devices, which include various sensors with wireless connectivity based on Sigfox technology. Current version of IOTA Viewer provides access to measurements made by IOTA Temperature Sensors. Application allows users to connect devices using ID and passcodes provided with the devices and then view temperature measurements on dynamic charts. Users may set temperature alerts individually for each device and get notifications when set thresholds are exceeded. For users’ convenience the devices can be individually named. Each user may have access to multiple devices and the same device may be accessed by many users, if they have access to correct ID and passcode.