Health & wellness
Flat-Rate Context-Aware Biomarker Coach
For people who already have blood-test results: a flat-rate app that ranks what to fix first and tracks each retest.
In plain English
- What category is this?
- Clinics, coaches, and consumers buy for care, fitness, or wellbeing workflows. Here the focus is consumer health.
- The idea, briefly
Build a flat-rate ($60/year or $8/month) plan you can use with labs you already have from any source. It takes your medical history, medications, age/sex and wearables into account, ranks the two or three highest-leverage changes to make now instead of listing 100 markers, and runs a retest loop that shows which change moved which marker. No test or blood draw is bundled or required.
More ▾- What buyers expect
People comparing tools like Function Health, InsideTracker, Superpower expect the basics to work without surprise fees or missing pieces. The loud complaints are: The premium product's 'clinician review' adds no prioritization or roadmap; and the plan ignores the member's actual medical history.
More ▾
- Sources
- 21
- Checked
- 14
- Competitors
- 6
- Gaps
- 6
- Page checked
- 14 · 67%
- Snippet only
- 7 · 33%
- Documented
- 8 · 53%
- Interpreted
- 7 · 47%
- complaint7
- pricing6
- revenue3
- market3
- playbook2
Competitors
6- Function HealthFree
- Levels$15/mo
- Sage HealthspanFree
Parsed from public pricing blurbs (entry paid tier when available). Max in set: $15/mo.
| Competitor | From | Free tier | Source |
|---|---|---|---|
| Function Health | Free | Yes | functionhealth.com✓ |
| InsideTracker | Unverified | — | store.insidetracker.com✓ |
| Superpower | Unverified | — | superpower.com✓ |
| Levels | $15/mo | — | support.levels.com✓ |
| Kestrel Report | See notes | — | kestrelreport.com✓ |
| Sage Healthspan | Free | Yes | sagehealthspan.com✓ |
What customers complain about
6| Gap | Src |
|---|---|
The premium product's 'clinician review' adds no prioritization or roadmap. | |
The plan ignores the member's actual medical history. | |
Elevated markers are punted back to the user with a 'see your doctor' message rather than an action. | |
Even the longest-running interpretation product gives blanket advice. | |
Users are left overwhelmed and unable to convert numbers into daily behavior. | |
Buyers pay a second vendor to get the interpretation the clinic failed to provide, and object to the bundle price. |
Documented Interpreted
How competitors find customers
3| Tactic | Src |
|---|---|
| Function Health: gated, referral-only access plus a waitlist, distributed through a co-founder doctor-creator's audience and celebrity backers rather than paid acquisition. | a16z.com✓ |
| Superpower: a waitlist/scarcity launch plus creator and clinician word-of-mouth; its page states clinicians shared it unprompted and it runs creator and partner programs. | superpower.com✓ |
| Kestrel Report, a one-person interpretation service, reportedly acquired first users by posting in the competitor's own community (Reddit) where members were already complaining, | falconeye23.gumroad.com· |
Your angle & pricing wedge
| Piece | Claim | Src |
|---|---|---|
| Angle | A flat-rate ($60/year or $8/month) plan you can use with labs you already have from any source. It takes your medical history, medications, | |
| Wedge | Mechanism: unbundle the software from the test. Function ($365/year) and Superpower ($349/year) force an annual test membership, | store.insidetracker.com✓ |
How others got traction
3| Move | Why | Src |
|---|---|---|
| Function Health launched gated and referral-only with a waitlist and rode co-founder Dr. | Company/investor-attributed: a16z wrote that Function 'amassed nearly 50k members with little marketing', | a16z.com✓ |
| Superpower, a fast follower founded after Function, built a 150,000-person waitlist in about six mo… | Investor-attributed: the Will Ventures analysis states Superpower 'raised $28M after driving 150K waitlist signups in just six months'. | willventures.substack.com✓ |
| Levels sells a software-only membership ($80/year) that includes unlimited past-bloodwork upload, | Documented on the opened pricing page: the $15/month or $80/year membership includes the app and 'Unlimited uploading of past bloodwork and… | support.levels.com✓ |
Market heat
Function Health reports more than 500,000 members and over 100 million lab tests completed as of mid-2026, alongside a $450M General Catalyst non-dilutive growth financing. Company-stated and relayed by a secondary aggregator; not independently audited. Note: this 100M-test figure conflicts with the 50M-test figure in Function's own November 2025 announcement and the 75M 'results' figure on its pricing page.
More ▾Function Health says it raised a $298M oversubscribed Series B at a $2.5B valuation in November 2025 and cut membership to $365 from $499, and in the same announcement states members completed over 50 million lab tests since 2023 (company-published, self-reported).
More ▾Third-party researcher Sacra estimated Function at a ~$100M annualized revenue run rate in February 2025, up about 450% year over year, on roughly 200,000 subscribers (estimate, not company-confirmed).
More ▾Superpower reports 64,000+ members and a 4.6 Trustpilot rating on its own membership page (company-published, self-reported).
Superpower raised $28M after driving 150,000 waitlist signups in about six months (investor-reported by Will Ventures).
InsideTracker's membership page says it is trusted by more than 100,000 customers (company-published, self-reported).
Function's launch announcement reported nearly 50,000 paying members and a waitlist of over 200,000 at $499/year in mid-2024 (company press release).
Revenue signals
7| Signal | Src |
|---|---|
Function Health: 500,000+ members and 100 million+ lab tests completed as of mid-2026 (company-stated via a secondary aggregator, self-reported); | distilinfo.com✓ |
Function Health: ~$100M annualized revenue run rate in February 2025, up ~450% YoY, on roughly 200,000 subscribers (third-party Sacra estimate, | sacra.com✓ |
Superpower: 64,000+ members and a 4.6 Trustpilot rating (company-published, source 3); | superpower.com✓ |
InsideTracker: trusted by more than 100,000 customers (company-published, self-reported); | store.insidetracker.com✓ |
Category list prices run from a $95 one-time report (Kestrel, source 5) and a free interpretation app (Sage, | kestrelreport.com✓ |
The test itself is a commodity: direct-to-consumer comprehensive metabolic panels are advertised from $2.84-$3.98 (Mito member/non-member) and $5 (GoodLabs) up… | mitohealth.com✓ |
Ulta Lab Tests lists a comprehensive metabolic panel at about $22 cash; adjacent pages reportedly list a full wellness panel around $65 (page did not render on… | ultalabtests.com· |
Should you build this?
People already pay for blood tests and then cannot tell what to do with the results, so People already pay for this: Function Health charges $365 a year and reports over 500,000 members (company-stated, source 21), Superpower charges $349, and InsideTracker charges $149 a year just to read labs you already own. Paying customers say the plan is a generic recap that ignores their medical history and never tells them what to do first, but only the first such gap (source 7, opened) is fully verified; the remaining complaint sources are snippet-only Reddit threads and are treated as interpreted, not fact. This product sells only that missing piece as a flat $60-a-year app: rank the two or three changes that matter for you and show, at each retest, which one moved which marker. The risk is crowding, not demand: Sage gives interpretation away free and Levels bundles unlimited bloodwork upload into an $80 app, so the offer must win on sharper prioritization and a real retest loop rather than on being cheapest.
More ▾
All sources
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|---|---|---|---|
| pricing | page checked | 2026-10-04 | |
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