Coming 2027 · Latchkey Tools
Serum
Every blood test you've ever had, one history.
Serum keeps every blood test in one place. Upload a Quest or Labcorp PDF or type the numbers, review each line, and see what is high, low or in range and how every marker has moved from draw to draw. For you, and for the parent whose three doctors do not talk to each other. Not a diagnosis and not medical advice.
Get early access
Subscribers hear first, and founding members get the Vault price locked for life.
You also get the daily brief. Unsubscribe in one click.
Three views
- Overview. The latest draw: what's out of range, furthest first, and what moved the most since last time, with a sparkline on every row.
- Markers. Lipids, metabolic, blood count, liver, kidney, electrolytes, thyroid, hormones, nutrients, inflammation. Open one and see every draw on a chart with the reference band behind it.
- Reports. The library of draws. Open, edit, delete, export.
"LDL Cholesterol (calc)" and "LDL-C" land on the same marker, so the trend never splits.
Review before save
Serum reads the PDF, then shows you every line: name, value, unit, range. Fix a misread, drop a line, add one. Nothing is stored until you say so.
Built for the sandwich years
Add a profile for Mom. Her cardiologist, her nephrologist and her GP each see their own results; you see all of them, over time, in one place.
Private by construction
No third-party code, no ads, no sharing, delete any time. Health data is treated as regulated data because it is.
Why it matters
The problem Serum solves
Every result says "normal." Nobody sees the trend.
A marker can drift from the bottom of the range to the top over five years and every single report flags nothing. The trend is the information, and no portal shows it.
Six portals, six doctors, zero history.
Your GP, the specialist, the urgent care, the executive physical, the insurer's wellness program. Each one has a slice. You are the only system of record, and you're keeping it in a folder.
Your parents have it worse.
Three specialists who don't talk, a GP who sees the summary, and an adult child trying to answer "has her kidney function changed?" from memory. Serum is the one chart that answers it.
How it works
Upload, review, see the trend
- 1
Upload the PDF, or type it
Quest and Labcorp reports are what it's built for. Serum reads the text, falls back to the page images if the text is garbled, and throws away the header fields (phone, address, age) before anything else happens.
- 2
Review every line
Name, value, unit, reference range, one row per marker. Fix a misread, drop a line, add one. Nothing is saved until you confirm. Different lab names for the same test land on the same marker so the chart never splits.
- 3
See what moved
The overview opens on the latest draw: out-of-range markers first, biggest movers next, a sparkline on every row. Open any marker for the full history on one chart with the reference band behind it. Print a one-page summary for the appointment.
Ranges: the lab's printed range first; a typical adult interval, labeled as typical, when the lab printed none; unknown rather than guessed when there's neither.
A visit in the life
"Has Mom's creatinine changed?"
Her nephrologist asked. Her daughter had uploaded eleven reports from three doctors over four years into Mom's Serum profile. She turned the phone around: one chart, eleven points, the reference band behind them, the last three climbing. The nephrologist adjusted a medication that afternoon. The cardiologist had never seen the kidney numbers; the GP had seen only his own. Nobody had seen the line.
Illustrative scenario. Serum organizes numbers; the doctors make the decisions.
Free for every subscriber
One profile, three draws
Upload a report, review it, and see the overview and the marker list. Enough to find out what Serum shows you that your insurer's portal doesn't.
Vault membership · $79/yr, founding $59
The whole history, and the family
Unlimited draws, trends across years, PDF parsing at volume, export, profiles for a spouse and parents, and household sharing. Plus In Case and everything in Reader.
Questions people ask
- Which lab reports does it read?
- Quest- and Labcorp-style PDFs are what it is built for; any report can be pasted as text or typed by hand. Nothing is saved until you review every line.
- What does "in range" mean?
- If the lab printed a reference range, that range is used. If not, Serum falls back to a typical adult interval for markers it knows, and labels it as typical, not your lab's. If there is no range at all, the status stays unknown rather than guessed.
- Can I track my parents' results too?
- Vault members can add profiles for a spouse and parents and share the account with one other adult. The caregiving use is the point: one history across every doctor.
- Who can see my results?
- You, and anyone you add to your household. Serum has no third-party scripts, no advertising, and your health data is never used for marketing, shared with sponsors or aggregated for publication. You can delete everything at any time.
- What does the free version include?
- One profile and three draws: upload, review, the overview and the marker list. Unlimited history, trends across years, export and family profiles are part of Vault membership.
Serum organizes numbers you provide. It is not a diagnosis and not medical advice. Check any flag against the original report and talk to your doctor. Caring for a parent: the first 30 days.