Working with Apple was also challenging because I had to purchase an Apple Watch or iPhone (the data is stored locally only, with no server or API to call, which is great from a privacy perspective) and then deploy specific code on the device.
I’m not sure if this helps your use case, but I was planning to make the API public and create a CLI (similar to Sentry or Grafana’s gcx) to access it. But if you want a local first option, not the best solution
Device based strength tracking is still so weird to me.
Then you have friends and family that don't have the same devices than you and are nice enough to want / try your app.
I think this is a perfect example... somewhere out there a genius and a grug are happily exercising together for the simple joy of doing so and feeling good in their bodies, and nearby is a midwit with the GDP of a small village worth of wearable electronics wondering where the joy has gone as he laments the 0.1% of VO2MAX he's dropped since his last gadget-run.