AI & Software buyer FAQ
What is the best longevity tracking software in 2026?
Depends on what you're tracking. For comprehensive lab biomarker tracking with AI insights, Function Health is the editor's pick. For glucose monitoring, Levels CGM. For all-in-one longevity-medicine subscription, Lifeforce.
Is Function Health worth $365/year?
For buyers tracking 160+ biomarkers with AI-driven insights, comparing trends across multiple draws, and getting clinician review on abnormal results - yes. Function Health is the platform that productized executive physicals into a $365/year membership. For occasional lab buyers wanting a single panel (no subscription), InsideTracker at $300 per test is the lower-friction alternative. For active hormone-optimization protocols, you'll likely want a clinician-led service like Marek Health alongside Function Health for the prescription side.
Do I need a CGM (Levels) if I am not diabetic?
It depends on what you're trying to learn. For 30 days of insight into how your specific body responds to specific foods, exercise, sleep, and stress, a CGM is the only way to get continuous glucose data. After ~30-60 days most non-diabetic users have learned what they need to know and stop wearing it. For ongoing daily wear without a clinical glucose-management need, the cost-benefit gets thinner. Levels packages this 30-60 day insight period as a structured program rather than indefinite subscription.
The Longevity Gear Buyer's Checklist
The specs that actually decide whether a sauna, cold plunge, red light panel, or smart ring is worth it, plus the real price range for each. Get the free PDF, plus one weekly email on the gear worth buying.
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