Comparison of (passive) walking apps?

Apologies if this is in the wiki, I couldn't find anything about step counters. I also searched the sub but the posts were quite old. I'm using cash walk right now, and starting to try some others. What's the best setup? My priorities are low interaction, and high payouts. Ads are fiiiine, but the more time I can spend looking at flowers instead of pushing buttons, the better.