So I ended up buying the KardiaMobile 6L instead of an Apple Watch. I just received it before dinner thanks to Amazon Prime same-day delivery. I played with it for awhile and it seems pretty cool. I don’t know if my doctor will take its “normal” diagnosis over a 12-lead EKG in their office. I asked my parents to try it too. They are both “normal” but much harder to measure using the six lead method.

The app want you to measure your EKG at least three times a week to have enough data for more analysis. There is also a premium subscription that adds a few more features.