Function Health is the best-funded new entrant in consumer testing. Co-founded in 2021 by Jonathan Swerdlin (CEO) and Dr. Mark Hyman, it has raised roughly $350M at a $2.5B valuation. The members-only experience is built around two annual Quest draws, an in-app dashboard, AI-generated clinician notes, and its Medical Intelligence Lab. The iOS app sits at 4.9 out of 5 across more than 20,000 reviews. For US users without a primary-care relationship who want a single subscription that covers testing, results, and guidance, Function delivers exactly what it sets out to.
Function is built as a closed system, and that is a deliberate product choice. Results flow through Quest panels, the dashboard is English-only, the service is offered in the US outside of New York and New Jersey, and additional family members are a paid add-on. That bundle serves its core audience well. It is a less natural fit for people who already get bloodwork elsewhere, receive reports in other languages, or want one place that holds every family member’s history.
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Function Health sells you new bloodwork. MyBloodTest helps you make sense of the bloodwork you already have.
MyBloodTest takes a different shape.
MyBloodTest assumes you already have a way to get bloodwork — a primary-care doctor, an annual physical, an at-home kit, or a paid testing service like Function. Our job is to make sense of those results across time, sources, family members, and languages. We do not sell lab tests, so there is no testing logistics layer. The trade-off is real: you arrange and pay for your own draws. Everything else is free on iOS, Android, and web — multi-language scan, five family profiles, and wearable sync with Apple Health, Health Connect, Fitbit, and Withings. Share-with-doctor links use QR, PIN, and AI highlights, and reference ranges are cited from 10+ named sources including Mayo, ARUP, Quest, Labcorp, WHO, and CALIPER.
How to use both together.
If you are an active Function member, MyBloodTest works alongside it rather than replacing it. Open-source browser extensions like LabSaver and Personal Health Data Tool export your results to CSV; from there you can scan them into MyBloodTest next to older labs, results from other providers, and your family’s history. You keep the Function panels and clinician notes; MyBloodTest holds the longer-running picture and gives you one tap to share it with your doctor.