Nuvo vs Function Health: Daily Biological Age or 100+ Lab Tests?

Pick Function for 160+ clinician-reviewed labs at $365/year. Pick Nuvo for a daily biological age on iPhone from 21 biomarkers if you already have bloodwork.

Written by the Nuvo Longevity editorial team at Firefly Labs LLC.

Choose Function Health if you want a clinician-reviewed lab membership: 160+ tests a year, twice-yearly draws, and a biological age calculated from those labs. Choose Nuvo if you already pay for blood work and want a daily biological age on iPhone and Apple Watch from 21 biomarkers — HealthKit wearables plus optional lab PDF upload — with on-device AI and no account. They are different products: a lab membership versus a daily biological-age app, not two versions of the same job.

Written by the Nuvo Longevity editorial team at Firefly Labs LLC, the developer of Nuvo. Function Health details below are taken from Function’s public site and App Store listing. This page is educational and is not medical advice.

What each product actually sells

Function Health: a lab membership

Function’s pricing page sells one membership: $365 per year, billed annually (Function frames this as $1/day). The membership includes 160+ lab tests annually, clinician review of results, a personalized protocol, and the option to add MRI and CT later at extra cost. Function is insurance-free and marks the membership as HSA/FSA eligible.

Testing cadence is explicit on Function’s homepage and FAQ: start with 100+ tests at the annual visit, then 60+ tests 3–6 months later. You can order additional biomarkers on demand for a member-only extra cost. Draws happen at 2,000+ lab locations in the US, with home or office concierge draws in select locations.

Function publishes a biomarker library at What we test. Included panels cover heart (ApoB, Lp(a), LDL particles, hs-CRP), metabolic (glucose, HbA1c, insulin), hormones, thyroid, nutrients, heavy metals (lead, mercury), autoimmunity, kidney, liver, and more. Advanced add-ons — GRAIL Galleri®, Alzheimer’s-related tests, extended metals, MRI/CT — are sold separately.

Function also ships an iPhone app (Function Health on the App Store, id 6471280307). The listing is iPhone-only. It includes lab results, personalized Protocols, Private AI Chat, record upload, and a “Connect Wearables” feature so members can sync Apple Health and other devices “to see how your activity, sleep, and daily habits affect your lab test results.” Function’s FAQ confirms you connect supported apps after logging in, under Connected Apps. That is wearable context next to labs, not a daily wearable biological-age product.

Function’s biological age is a lab calculation, tested twice a year. The Biological Age category page lists it as included in membership: “Biological Age 2x [CALCULATION DERIVED FROM LAB TESTS].” Function does not describe a daily Apple Watch biological age score on that page or on pricing.

Nuvo: a daily biological-age app

Nuvo Longevity (App Store: Nuvo: Longevity Coach, id 6762535065) is an iPhone and Apple Watch app. It calculates a daily biological age from 21 biomarkers: Apple Health / HealthKit data from Apple Watch, Oura, or Garmin, plus optional lab PDF upload so results you already paid for can sit in the same score.

Coaching runs as on-device private AI (Nuvo Intelligence). There is no account. Apple’s privacy nutrition label for Nuvo is Data Not Collected. Price is $4.99/month or $24.99/year after a 7-day trial — $24.99/year is $2.08/month billed annually.

Nuvo is not a lab. It does not schedule Quest draws, review 160 markers, or sell MRI. If you want the membership Function sells, buy Function. If you already have labs — from Function, a clinician, or another panel — and you want a number that moves on sleep, HRV, and training between draws, that is the Nuvo job. For a wider field of apps, see our 2026 biological age app comparison.

Comparison table

Where Function is the better purchase

Function wins on lab breadth and logistics. A standard physical often skips markers Function includes by default — ApoB, Lp(a), insulin, hs-CRP, heavy metals, autoantibodies, a full nutrient panel. Clinicians review every result and flag issues. If you do not already have a way to order that panel, $365/year is the product: two structured draws, a dashboard, and a protocol.

Function also wins if you want imaging access (MRI/CT as paid add-ons), on-demand extras such as multi-cancer screening, or a membership your clinician can work from. Those are medical-adjacent services Nuvo does not sell.

If you do not own an iPhone and Apple Watch, Function is also the option that does not depend on that hardware. Nuvo does.

Where Nuvo is the better purchase

Nuvo wins on cadence and architecture. Function’s biological age updates when new labs land — twice a year on the included schedule. Sleep last night, a training block, or a week of poor recovery will not move that number until the next draw. Nuvo recalculates daily from 21 biomarkers so the score can respond to HealthKit data in between labs.

Nuvo also wins on cost if you already pay for blood work. Stacking Function ($365) plus Nuvo ($24.99/year) is still a different decision than replacing Function. The middle-funnel case is: keep the labs you have, upload the PDF, and use the daily score as the feedback loop. You do not need Function’s membership to use Nuvo, and Nuvo does not replace Function’s 160+ tests.

Privacy is a structural difference, not a slogan. Function is an account-based health membership with cloud storage, clinician review, and App Store data linked to you. Nuvo runs coaching on-device, requires no account, and uses the Data Not Collected privacy label. If you will not put longitudinal labs and wearables on a membership account, Nuvo is the one built for that constraint.

Nuvo’s App Store presence is early: 4 ratings. Function’s iOS app is not. That gap is real. We are not going to inflate it.

Can you use both?

Yes. That is the honest bottom-funnel answer for readers who already pay for blood work. Use Function (or any clinician panel) for the deep, twice-yearly chemistry. Use Nuvo to turn 21 biomarkers — including an optional lab PDF — into a daily biological age on the phone you already carry. They do not cancel each other; they cover different clocks.

If the only job is “order 100+ tests for me and have a clinician read them,” stop at Function. If the only job is “daily biological age from wearables plus labs I already have, privately, on iPhone,” stop at Nuvo. Download app.

Habits that actually move aging markers — sleep, aerobic fitness, glucose, inflammation — are covered in How to reduce biological age. This page is only about which product to buy for which job.

Pricing math without invented discounts

Function: $365/year for the membership as listed on functionhealth.com/pricing. Extra on-demand tests and imaging are not included in that number; Function does not publish a single all-in figure for those add-ons on the pricing page, so we do not invent one.

Nuvo: $4.99/month or $24.99/year ($2.08/month billed annually) after a 7-day trial. No lab draw is bundled.

Comparing $365 to $24.99 as if they bought the same thing is a category error. One buys twice-yearly 160+ tests and clinician notes. The other buys a daily 21-biomarker score on iPhone and Apple Watch.

Frequently Asked Questions

Should I pick Nuvo or Function Health?
Pick Function Health if you want 160+ clinician-reviewed lab tests twice a year for $365 and a biological age calculated from those labs. Pick Nuvo if you already have blood work and want a daily biological age on iPhone and Apple Watch from 21 biomarkers, on-device AI, and no account. Many people who already pay for labs use both.

Does Function Health have a daily wearable biological age?
Not on Function’s public product pages. Function lists biological age as a calculation derived from lab tests, included in membership and tested twice a year. The iOS app can connect Apple Health and other wearables for context next to lab results. That is not the same as a daily wearable biological-age score.

Does Function Health have an iOS app?
Yes. Function Health is on the App Store (id 6471280307) as an iPhone app with lab results, Protocols, Private AI Chat, and Connected Apps for wearables. The listing is iPhone-only. Nuvo is an iPhone and Apple Watch app (Nuvo: Longevity Coach, id 6762535065).

Can I use Function lab results in Nuvo?
Yes. Nuvo is not a Function competitor for ordering panels. You can add labs you already have, including an optional lab PDF upload, into Nuvo’s 21-biomarker daily score alongside HealthKit data from Apple Watch, Oura, or Garmin.

How much do Function Health and Nuvo cost?
Function membership is $365 per year on Function’s pricing page, with on-demand tests and MRI/CT extra. Nuvo is $4.99/month or $24.99/year ($2.08/month billed annually) after a 7-day trial.

Does Nuvo require an account?
No. Nuvo uses on-device private AI and no account. Apple’s privacy label is Data Not Collected. Function requires an account; Function describes its systems as HIPAA-aligned and SOC 2 Type II.

How many biomarkers does Nuvo use?
21 longevity biomarkers. They combine HealthKit wearable inputs with optional labs such as HbA1c, fasting glucose, HDL, CRP, creatinine, and more.

Is this medical advice?
No. This comparison is educational. Neither Function Health nor Nuvo replaces care, diagnosis, or treatment from a licensed clinician. Lab results should be reviewed with a qualified professional.

If the job is a daily biological age from 21 biomarkers on the iPhone and Apple Watch you already own, Download app.