I reviewed Vaavud’s first-gen Mjolnir smartphone anemometer a few years ago and discovered its shortcomings, yet appreciated its utility on the water and land. I used it for seaplane flying on remote lakes where local wind reports weren’t available, and to compare aging ATIS recordings on the home field. The disappointment was a lack of wind direction display.
That’s why I was anxious to try Vaavud’s newer Sleipnir, which has new measuring blades and a wind direction utility. Pleased with the company’s home weather station gear, I also tried the WeatherFlow WindMeter. It turned out to be the favorite.