A doctor-ready PDF in one tap
Flagged values first (including PSA velocity), then lab trends with reference bands and trough/peak timing, injection history and your protocol — the report a busy provider can read in 30 seconds. Seralog Plus
TRT Bloodwork Tracker · Injection Log · Lab Reminders
The bloodwork tracker built for men on TRT
Seralog records your labs and finally makes sense of them — every marker trended against its range. Log your shots in two taps, get reminders that actually fire, and walk into every appointment prepared. Private, on your iPhone, no account.
Download on theApp Store
Coming later toAndroid
- On-device & private
- Free core, no wall
- Reminders that fire
- No account, ever
Seralog is a private, on-device bloodwork tracker for men on TRT. It records your lab results — testosterone, estradiol, hematocrit, SHBG, PSA and more — and trends each marker against its reference range, logs injections in two taps with six-site rotation, sends reminders that actually fire (including every-3.5-day schedules), and exports a doctor-ready PDF. Logging, reminders and trends are free; there is no account and nothing leaves your iPhone.
You get your labs back — and have no idea if your numbers are safe
Roughly 20 million U.S. men have low testosterone, and those on TRT have to run a lifelong routine: inject on schedule, rotate sites, get regular bloodwork, and read markers like estradiol and hematocrit they were never taught. Most do it in a spreadsheet or not at all — then show up to a blood draw unable to tell whether a number is good or a red flag.
Seralog is the app that turns those scattered numbers into a picture you — and your doctor — can actually read.
Prevalence: an estimated ~20 million U.S. men have low testosterone (hypogonadism); only a minority are treated. Discuss your own results with your provider.
Three jobs, done properly
Everything a man on TRT actually needs — nothing he doesn't
Understand your labs. Log your shots. Never miss a dose. Calm, clinical, and quick — not "enhanced-athlete" clutter.
Pillar 1 · Bloodwork
Understand your labs over time
The hero of the app. Every marker plots as a trend line over its reference band on a true time axis — so you see the slope, not a single number out of context.
- Total T, Free T, Estradiol, Hematocrit, SHBG, PSA and more
- Tag each draw trough or peak so numbers are comparable
- Sensitive-estradiol (LC-MS/MS) flag — the #1 lab-literacy trap for men
- Plain-English "what this means" on every marker — education, never a dose
- Enter your own lab's range, or use TRT-aware defaults
Pillar 2 · Injections
Log a shot in two taps
A dose stepper and your saved protocol mean logging takes seconds — the only way you'll actually keep it up.
- Six-site rotation suggests the most-rested spot
- Compound-agnostic: testosterone, HCG, an aromatase inhibitor, peptides, or a custom compound
- Optional volume, needle gauge and notes tucked behind "More"
- Every logged shot feeds your trends and your doctor report
Pillar 3 · Reminders
Reminders that actually fire
The #1 complaint about every rival is reminders that silently stop. Seralog treats reliability as the product.
- Day-before, one-hour-before, and missed-dose alerts
- Real TRT cadences: every 3.5 days (E3.5D), twice weekly, weekly, or every N days
- Auto-cancels once you've logged the dose — no nagging
- A smart bloodwork reminder nudges you to draw at trough
Walk into your appointment prepared — and see what moves your numbers
See how labs, doses & feel move together
Insights overlays your labs, injection timing and daily check-ins (energy, mood, libido, sleep) so you can spot what actually changes how you feel. Seralog Plus
How it works
Three steps to labs that finally make sense
-
1
Add your protocol & last labs
Set your compound and schedule, then punch in your most recent blood draw — you'll see your first plotted marker in under a minute.
-
2
Log in seconds, get reminded
Two-tap shot logging and reminders that fire keep the daily loop effortless — so the data is actually there when you need it.
-
3
Understand it & share it
Watch each marker trend against its range, read plain-English context, and hand your doctor a clean PDF.
Why Seralog
Most TRT apps log your shots. Few help you understand your blood.
Seralog is bloodwork-first, calm, and honest about what it is.
| What matters | Typical TRT app | Seralog |
|---|---|---|
| Bloodwork | Bolted on, if present | The hero — trends vs reference ranges |
| Understanding markers | Raw numbers only | Plain-English context (education only) |
| Estradiol assay | Ignored | Sensitive LC-MS/MS flag |
| Reminders | Silently stop (#1 complaint) | Rolling window incl. E3.5D — they fire |
| Injection sites | A single field | Six-site rotation with rest tracking |
| Doctor report | None or an afterthought | One-tap PDF, flagged values first |
| Pricing | Everything behind a wall | Free core; Plus only for the extras |
| Privacy | Accounts, cloud, tracking | On-device, no account, Data Not Collected |
Seralog is an educational tracking tool, not medical advice. Marker context is based on published reference ranges and always defers to your provider.
Pricing
Free where it counts. Plus where it pays off.
Logging, reminders and trends are free forever. Seralog Plus unlocks the "prepare and go deeper" layer — never the basics.
Free
$0forever
- Two-tap injection logging + six-site rotation
- All reminders (incl. E3.5D, missed-dose)
- Bloodwork logging + trend charts
- JSON backup & restore
- Fully on-device · no account
Best value
Seralog Plus
$2.50/mo
Save 50%billed yearly · $29.99 · 7-day free trial
$4.99/mo
billed monthly · cancel anytime
- Doctor-ready PDF export
- "What this means" marker interpretation
- Insights — labs × doses × symptoms
- Everything in Free, always included
7-day free trial on yearly, then $29.99/yr. Cancel anytime in your App Store account.
Your data stays yours
Private by design — because hormone data should be
Your labs, doses and check-ins live on your iPhone. Seralog runs no servers and has no account, so your data is never uploaded, sold, or shared. No ads. No tracking SDKs.
- Everything works on-device
- App Store privacy label: Data Not Collected
- Backup is a plain JSON file you export and keep
Meet your guide
Sero keeps it calm, clear, and on your side
TRT is a long game, and the internet around it is loud. Sero is the opposite: steady, plain-spoken, and never judgmental. No bro-science, no scare tactics — just your numbers, explained, and a nudge when it's shot day.
"Your numbers, in plain English — and a reminder that never forgets."
Sero's whole job is to make logging and understanding your labs so easy you actually keep at it.
FAQ
Questions people ask before downloading
Is Seralog free?
Yes. Injection logging, all reminders, bloodwork logging with trend charts, and JSON backup are free forever — Seralog never puts a subscription wall on the basics. Seralog Plus ($4.99/month or $29.99/year, with a 7-day free trial on the yearly plan) unlocks the output layer: the doctor-ready PDF, plain-English marker interpretation, and Insights.
What blood markers does Seralog track for TRT?
The markers men on TRT actually watch: total testosterone, free testosterone, estradiol (E2), hematocrit, hemoglobin, SHBG, and PSA — plus lipids and any custom marker you add. Each reading is plotted over time against its reference range, and you can tag a draw as trough or peak so the numbers are comparable.
Does Seralog remind me to inject on a TRT schedule?
Yes — reliable reminders are the point. Seralog fires day-before, one-hour-before, and missed-dose alerts and supports real TRT cadences: every-N-days including every 3.5 days (E3.5D), twice weekly, and weekly. A rolling notification window is topped up on every launch so alerts don't silently stop, and a reminder auto-cancels once you've logged the dose.
What is a normal estradiol or hematocrit level on TRT?
Reference ranges vary by lab, assay, age and sex, so Seralog shows your value against the range your lab used and adds education-only context — for example, that estradiol should be read on a sensitive (LC-MS/MS) assay for men, and that labs commonly flag hematocrit above roughly 52–54%. Seralog does not diagnose or recommend doses; always discuss your targets with your prescribing provider.
Who is Seralog for?
Seralog is built for men on prescribed testosterone replacement therapy (TRT), and works for anyone on an injectable protocol — HCG, an aromatase inhibitor, or peptides — who wants to understand their bloodwork, log doses in two taps, and never miss an injection.
Does Seralog work without an internet connection?
Yes. Because everything is stored on your device, logging, reminders, trend charts and the doctor PDF all work fully offline. The only actions that need a connection are buying or restoring a Seralog Plus subscription.
Is Seralog better than tracking my labs in a spreadsheet?
Seralog does what a spreadsheet can't: it plots each marker against its reference range automatically, tags trough vs peak draws, sends reminders that actually fire, overlays labs with doses and symptoms, and exports a doctor-ready PDF — with no manual formatting.
Can Seralog track HCG, an aromatase inhibitor, or peptides too?
Yes. Logging is compound-agnostic: alongside testosterone you can log HCG, an aromatase inhibitor like anastrozole, peptides, or any custom compound — each with its own dose and schedule. Seralog is built TRT-first but isn't locked to one compound.
Can I export a report for my doctor?
Yes. Seralog Plus exports a doctor-ready PDF that leads with flagged values (including PSA velocity), then shows lab trends across draws with reference bands and trough/peak timing, your injection history, symptom check-ins, and your current protocol — a clean summary a busy provider can read in about 30 seconds.
Is my health data private?
Yes. Everything stays on your iPhone. Seralog runs no servers and has no account or sign-up, so your data is never uploaded, sold, or shared. Its App Store privacy label is Data Not Collected. Backup is an optional JSON file you export and keep yourself.
Is Seralog available on Android?
Seralog launches first on iPhone (iOS 14 and later). An Android version is on the roadmap but not yet available.
Is Seralog medical advice?
No. Seralog is an educational tracking tool. Its marker context is educational, based on published reference ranges, and never a dosing instruction; it does not diagnose or treat. Always consult your healthcare provider before making decisions about your therapy.
Stop guessing at your bloodwork. Start understanding it.
Track your labs, log shots in two taps, and never miss a dose — free on iPhone.