PhenoAge is a peer-reviewed estimate of biological age from nine standard blood biomarkers. Punch in your numbers below — the math runs in your browser, your data never leaves your device. If you want to track it across every test you take, that's the part we charge for.
Here's a composite illustration — a fictional user we'll call M., 41 at first test, tracked over 24 months. The line moves down. Then it moves up. Then down again. That's the actual point: this isn't a before-and-after, it's a continuous read on what your habits and your life are doing to your biology. Tracking doesn't fix anything on its own. It just makes the trajectory visible.
You already have the first data point — your PhenoAge from the calculator above. The paid tracker handles everything after that: saving each test, parsing your lab PDFs automatically, comparing what changed since your last result, and reminding you to retest before you forget. You bring the labs. We handle the math, the memory, and the comparison.
PhenoAge is a biological age estimator developed by Morgan Levine and colleagues in a 2018 peer-reviewed study, validated against mortality outcomes in the NHANES dataset.
It uses nine biomarkers that come standard on a complete blood count, comprehensive metabolic panel, and C-reactive protein test — the labs most adults already get at their annual physical.
The algorithm is open, the paper is public, and the calculator above implements it directly. You can verify the math yourself.
Why these nine? Each one independently associates with mortality risk in large population studies. Albumin tracks liver and kidney function. CRP captures systemic inflammation. RDW correlates with chronic disease burden. Glucose with metabolic health. And so on.
Combined with chronological age and weighted by their mortality coefficients, they produce a score that estimates how old your physiology looks compared to a reference population. Lower than your chronological age is favorable. Higher means something is worth attention.
It is not a diagnosis. It is not a medical device. It is a research-grade signal that, tracked over time, can tell you whether your trajectory is moving in the direction you want.
The math is free because the math is published — we didn't invent it and we won't pretend otherwise. What costs money to build and maintain is everything around the math: saved history across years, automatic parsing of your Quest and Labcorp PDFs so you never type biomarker values again, per-test reports that compare what changed since your last result, and the reminder to retest before you forget. If you only ever want to calculate your number once, use the free calculator above — that's what it's for. If you're actually trying to track this over time, the $49/year (or $29 for your first year, if you sign up during early access) buys you not having to maintain a biomarker spreadsheet for the rest of your life.
No new blood draw is needed if you already get an annual physical. The nine biomarkers PhenoAge uses (CBC, CMP, and CRP) are some of the most commonly ordered tests in primary care. Pull your last lab report from your doctor's portal, Quest's MyQuest, or Labcorp's portal, and type the values into the calculator above. If your doctor doesn't order CRP, you can add it for around $20 at most direct-to-consumer lab services.
No. If you've had bloodwork done in the past — and most adults have — you can backdate as much history as you can find. Sign up, dig the last few years of lab PDFs out of your patient portal, enter them with their test dates, and you have a trend line on day one. The product gets meaningfully more useful with three historical data points than with one, and most people have more old labs in their portal than they realize. This is one place we're structurally different from the kit-based services — their algorithms only work on tests they sell you, so you start at zero on day one. We use peer-reviewed math that runs on any standard lab panel, including ones you got years ago.
Most biological age products bundle the testing with the analysis — they sell you a $300+ blood draw, run their own proprietary scoring, and lock you into their kit. We don't sell labs and we don't ship anything. You bring the bloodwork you already get from your doctor or Quest or Labcorp, we run a peer-reviewed open algorithm on it, and we charge $29–49 a year for the tracking. Two real differences worth naming: we're an order of magnitude cheaper because we're doing an order of magnitude less, and because we work on standard labs rather than a proprietary kit, every previous lab panel you've ever had can be your starting trend line. With kit-based services, you start at zero the day you sign up. With us, you start with however much history you can find in your patient portal.
No, and we won't pretend otherwise. PhenoAge is an educational tool and a research-validated estimate. We don't diagnose, treat, or prevent any disease. We don't tell you to take supplements. If your biomarkers look unusual, talk to your doctor — they ordered the test in the first place. Our terms of service say all of this in more legalese.
The free calculator above runs entirely in your browser — your biomarker values never touch our servers. When the paid tracker launches, we'll store the nine biomarker values and the dates of your tests so you can see them across time. That's it. We won't keep the original PDFs after parsing them. We won't share or sell your data to anyone, ever — not advertisers, not data brokers, not "research partners." You can export everything as a file, or delete your account, anytime. We are not a HIPAA-covered entity (we're a consumer wellness tool, not a healthcare provider), but we treat your data with at least that level of care.
A very small team. We're not VC-backed. We're not chasing a billion-dollar exit. We want to build a useful tool that pays for itself, treats users like adults, and stays around for a long time. If that resonates, you're in the right place.