Function Health is a lab-testing membership: 160+ tests a year at Quest labs or at home, clinician notes on your results, personal protocols and a private AI chat that answers questions about your data. Scans and other tests are sold as add-ons.
Emerge Care is built around how you feel day to day and your doctor visits: you tell it how you feel, it keeps the log on your iPhone, answers with named sources, reads lab reports you upload, and builds a one-page summary for your next appointment.
Choose Function Health if
You want the testing done for you: a large panel twice a year with clinician notes, Android support, and add-ons like imaging.
Choose Emerge Care if
You want to log symptoms and side effects in your own words, get answers that name their source, keep your records on your phone, and bring a summary to your own doctor.
At a glance
Emerge CareFunction Health
Log symptoms and side effects by talking✓Yes–No
Answers from your own log✓Yes✓Yes
Names a source for every health fact✓Yes–No
Visit summary for your doctor✓Yes◐Partly
Check-ins and reminders after a visit✓Yes–No
Health records stored on your phone✓Yes–No
Reads your lab results✓Yes✓Yes
Works with Apple Health✓Yes✓Yes
Details and sources are in the table below.
Side by side
Function HealthEmerge Care
Built forFunction HealthPreventive lab testing and tracking results over time12Emerge CareTracking how you feel between visits and getting ready for the next one
Symptom and side-effect logFunction HealthNone found1Emerge CareTell it how you feel in your own words; it logs symptoms and side effects and checks in when something keeps coming back
Cited health sourcesFunction HealthIts AI chat draws on your data and "Function's research insights"; answers do not name their sources4Emerge CareEvery health fact cites MedlinePlus, Mayo Clinic, the CDC or the NIH, and it says so when it has no source
Visit preparationFunction HealthClinician notes on your results; no summary built for your own doctor's visit4Emerge CareOne-page visit summary PDF (symptoms and side effects, heart rate, check-ins, labs, weight, your questions) plus a questions-for-your-doctor list
Records and labsFunction HealthIts core strength: 160+ tests a year, plus upload of outside records12Emerge CareUpload a lab report as a PDF or photo; it reads the markers and adds them to a Health Age estimate
Where your health data livesFunction HealthIn its cloud; says it does not use health information for interest-based advertising and that HIPAA does not apply to all data it processes3Emerge CareHealth records and chats stored on your iPhone. Each question passes through our server to the AI and back; the server keeps nothing and logs nothing.
PlatformsFunction HealthiOS, Android and web; Apple Health and other wearables16Emerge CareiPhone, with Apple Health and Apple Watch
PriceFunction Health$365 a year (USD), HSA/FSA eligible; scans and add-ons cost more2Emerge CareFree to download on iPhone, with a monthly subscription in the App Store
Where Emerge Care is different
You log symptoms and side effects by talking, and it checks in when something keeps coming back.
Every health fact names its source, such as MedlinePlus, Mayo Clinic, the CDC or the NIH.
A one-page visit summary PDF and a questions-for-your-doctor list.
Reminders and check-ins after a visit.
Your health records and chats are stored on your iPhone.
Works with lab reports you already have, from any lab.
Where Function Health is stronger
It orders and runs 160+ lab tests a year, with clinician review.
Imaging and other add-on tests.
Runs on Android and the web.
Can connect your results to other AI tools.
Can you use both?
Yes. Get your labs through Function, upload the report to Emerge Care, and keep it next to your symptom log and visit summary.
Questions
How much does Function Health cost?
Function Health lists membership at $365 a year, HSA/FSA eligible (checked 4 October 2026). Scans and add-on tests cost more.
Does Function Health have AI?
Yes. Its private AI chat answers questions about your results, history and wearable data. We found no statement that its answers name their sources.
Can Emerge Care read my Function Health results?
Yes. Upload the report as a PDF or photo and Emerge Care reads the markers and adds them to your Health Age estimate.
Does Function Health prescribe medication?
We found no prescribing service on its own pages; clinicians review your results.
Can I use Function Health and Emerge Care together?
Yes. Function for testing, Emerge Care for your symptom log, sourced answers and the summary you bring to your doctor.
Sources
Facts about Function Health come from its own pages, its App Store listing and press coverage, checked on October 4, 2026. Prices and features change, so check Function Health's own site before you decide.
Emerge Care makes this page. We are not affiliated with Function Health; names are trademarks of their owners and are used only to compare. Spotted something out of date? Email hello@getemergeapp.com and we'll fix it.