Safety is

Well said, Nrdctcg. This app provides valuable information for those of us who are professionals in the field of safety and know how to use it. Those reviewers only complaining about the cost of development are clueless and probably will remain so until such time as someone they care about suffers from heat stress, exhaustion or stroke. By then it may be too late.
Kudos OSHA!

Labs47 about OSHA Heat Safety Tool