I’ve spent the last 10 months building Zelus, a walking app that turns your real-world distance into progress through virtual challenges. It’s now live on iOS and Android, and I’ve reached the point where I know it too well to test it objectively. I’m looking for people willing to try it and tell me what’s confusing, awkward or broken — including any crashes or, hopefully not, database wipes. Blunt feedback is welcome. Ratings are also appreciated if you genuinely like it. Video: https:...