★★★★★
“I used Trekalvico to plan a four-day traverse in the Bernese Oberland and the elevation data was remarkably precise — the actual cumulative ascent matched the figures on the site within about 50 metres. The walking time estimates were calibrated well for my fitness level, which meant I arrived at each mountain hut with daylight to spare. The safety checklist reminded me to pack microspikes for a section that still had late-season snow, which proved essential on the second day. I would not plan an alpine route in Switzerland without checking Trekalvico first.”— Margaret Holloway