Works in a pinch – Kello Review

Not the easiest app to use. The results tend to bounce around a bit, but I was able to regulate a 6497 clone to within +/- 10 sec from over +95 sec over 24 hours. Considering the alternatives out there: no other app or $$$ on a timegrapher or watch repair person, I'll say it's money well spent.
Review by Driver1969 on Kello.