Best symptom tracker for product managers

There are roughly 150-200 symptom tracking apps on major app stores, but almost none are designed with product managers or knowledge workers as the primary user. The dominant players (Apple Health, Samsung Health, MyChart, Cronometer) optimize for patients managing chronic conditions or general fitness, which means they're cluttered with medical jargon, medication logs, and doctor-sharing features that PMs don't need. The real pain point is that existing trackers treat symptoms as medical events requiring clinical documentation, when what a vibecoder actually wants is a lightweight correlation engine—quick logging tied to work output, meeting performance, or shipping velocity. The gap exists because the health tech market assumes symptom tracking = medical necessity, not productivity optimization. A new entrant should laser-focus on three things: (1) frictionless logging in under 5 seconds (no dropdowns, just voice or quick-tap), (2) correlation dashboards that show how symptoms actually impact your shipping velocity or deep work capacity, and (3) zero medical framing—call it 'energy tracking' or 'pattern logging,' not 'symptom management.' The winning move is positioning this as a performance tool first, health insight second.