What finally made your health data useful, instead of just present?

I spent about two years with a Whoop, a couple of lab panels a year, and a genetic test I paid too much for, and I could not have told you a single thing those three sources said to each other.

Each app was fine on its own. Whoop knew my recovery. The lab portal knew my ApoB. Neither knew the other existed, and neither could tell me what to change on a Tuesday.

I am building in this space, so I am not neutral. But I am curious what actually worked for other people.

For those of you tracking health seriously: what was the thing that moved you from having data to using it? A specific tool? A spreadsheet you maintain by hand? A doctor who was willing to look at wearable exports? Giving up on most of it and picking two metrics?

And for anyone who tried to connect it all and quit, I would like to hear that too. What made you stop?