Android Phone Solutions


Ullr’s Mobile Avalanche Safety Guide™ (MAST™) is the world’s first digital snow and avalanche field notebook. We’ve combined established principles of snow science with the camera, GPS, inclinometer, compass and data communication features to create a simple and easy way to:

Download the most recent avalanche forecast from the regional center nearest you.

  • Record field observations during your tour. Gather location, aspect, slope angle and a photo in one easy step- no cell or Wi-Fi signal required.

  • Use the touch screen to record weather, terrain conditions, and signs of instability; create Snowpit profiles; enter stability test results.

  • Receive warnings if observations are outside safe ranges of established snow science.

  • Transmit your information to the closest regional avalanche center to share with forecasters and fellow backcountry enthusiasts.
  • Obtain educational information to keep your skills and knowledge sharp.  

Click Here to see the User’s Guide

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