“Easy, portable watch timing”
Sheldon Smith, iW Magazine
“One of the best examples of a horology focussed smartphone app”
Felix Scholz, HODINKEE
“Kello is a "must have" if you’re a serious collector”
Kevin Osborne, National Association of Watch & Clock Collectors
“It will save you time, earn you money, and prevent headaches chasing problems that don't actually exist”
Jordan Ficklen, Executive Director of the American Watchmakers-Clockmakers Institute