Function Health vs Ultrahuman
A side-by-side comparison of two AI tools on pricing, fit, and capability.
Function Health
Longevity Membership
Ultrahuman
Smart Ring + Metabolic
| 9/10 | Rating | 8.5/10 |
| health-coaches | Tier | wearables |
| Longevity Membership | Category | Smart Ring + Metabolic |
| From ~$365/yr | Starting price | Ring AIR ~$349; Pro ~$479 |
| Annual membership | Pricing model | Device (no subscription) |
| Cloud + lab draw | Deployment | Device + cloud app |
| Yes | Self-serve | Yes |
| Anyone who wants wide twice-yearly lab coverage with AI summaries and clinician sign-off | Best for | People who want sleep/recovery tracking and glucose insights with no recurring fee |
Our verdict
On balance, Function Health edges ahead at 9/10 — but if your budget, tier, or existing stack favors the other, it can be the better fit. Read both full reviews.