Works well - with caveats – Kello Review

1. I needed to use the microphone with the earPods which came with the iPhone. 2. The placement of the microphone on the case back is CRITICAL. You need to move it around until you get a strong signal. 3. Start with the highest amplification until you find a strong signal, then taper off. Once I found the "sweet spot" on the case back of the watch, Kello worked flawlessly. I compared its reading to a 24 hour timed test using an atomic clock signal, and it was spot on.
Review by tmarshl on Kello.