I like the Kacha-Kacha row counters. I bought the Nancy's Knit Knacks electronic row counter one time...but the doggone thing was so glitchy. When it worked, it was great. Bummer. Then the battery went dead as a doornail for the 2nd time. What a piece of doo-doo. And expensive, too. That's what's so aggravating.
Recently, I downloaded a Row Counter (free) from Google Play Market into my Android Smartphone. Yeah, there's more than one way to skin a cat, eh? It really works great, too! It won't "time out" either.