New lower price!

Featured in Outside Magazine, The Avalanche Review & TetonAT.com.

"Think of this, the most advanced backcountry app available, as another tool in your snow-safety toolbox." -Outside Magazine


Ullr Labs’ Mobile Avalanche Safety Tools (MAST) combines iPhone technology with established snow science to improve winter backcountry travel decisions, make it easy to share observations and adventures, and provide ongoing resources to increase avalanche knowledge and awareness.

We bring the features of gps, camera, compass, clinometer and snowpit book together in one easy-to-use tool*. With MAST you can:

•Download and read the most recent avalanche forecasts for your area.

•Review conditions recently reported by other users.

•Easily collect information about snow, weather and terrain conditions and avalanche sightings on your trips, using well-established snow science definitions and guidelines.

•Record location, elevation, slope angle and a photo of the area in one easy step--supports metric and imperial units.

•Receive warnings when recorded conditions and test results are at levels that avalanche science considers high-risk.

•Share your observations with the regional avalanche center (US only) and backcountry community in your area.

•Link to various educational resources to increase your knowledge of snow and avalanche science.

*GPS and Camera support only in devices equipped with those features.