FYI it doesn't seem to work on macOS, it lets you install it from the Mac App Store and step through the onboarding but it seems like it doesn't have the Health data API you're using. It doesn't request access to anything and just carries on, then "get started" doesn't do anything.
On iOS it works great though! One small thing I noticed is that after the onboarding it was showing the health visualisations as still requiring me to connect. After a few taps it updated and worked though.
Thanks for letting me know about the connection bugs! Will hopefully have an update for that ASAP
Keep up the good work!