You are five weeks into a protocol you assembled from a forum thread, a podcast and one paper you half-read. The vial is in the fridge. The schedule lives in your head, or in a note that says "Tue 250 SubQ" with no year on it. Then something changes, good or bad, and you cannot say what you were on when it started, whether you had already dropped the dose, or how this cycle compares to the last one. You have spent real money on this. You cannot say what any of it bought you. That is an information problem, not a health problem, and it is the one World's Best Tracker was built for.
Memory is not a dataset. A notes app records that something happened. It does not record the twenty percent less you took on Thursday, or the flat stretch that began nine days in. Your spreadsheet holds doses and no effects. Your ring holds effects and no doses. Neither puts the two on one line, and none of it is reconstructable later. World's Best Tracker puts doses, felt effects, sleep, training, the vial and the cost on one timeline, so the comparison you want in three months is possible.
A standing item carries a category, and Peptide is one of eleven, alongside Medication, Supplement, Hormone and the rest. Injection SubQ, IM and IV sit in the same route list as oral, sublingual, nasal and topical. You log the amount you actually gave, with a note, stamped to the minute.
Schedules run daily, every N days from an anchor date, named weekdays, a day of the month, or as-needed, and one date can be re-timed without touching the pattern. Reminders arrive as web push, 48 hours ahead, and export to your calendar.
Titration is a first-class record: a multiplier on one dose, a reason from ten fixed options, a note, clamped between 0.05x and 10x. Your standing dose is never rewritten: the plan says what you intended, the log says what you did. Zero is not offered, because a dose of nothing is a skip rather than a smaller dose, and a skip is recorded by its absence, which is how adherence counts it. The reason chips reorder toward the direction you just dialled and never filter the list, because being second-guessed by a form is how you teach someone to stop logging honestly.
Check-ins use a fixed vocabulary of 58 feelings across 11 categories: energy, mood, mind, sleep, physical, digestive, sexual, head, cardiovascular, immune and skin. Each takes an intensity from 1 to 5, an optional duration and a note, plus a one-tap normal, because normal days are data too. Free text cannot be counted, and what cannot be counted cannot be compared across cycles. Your own words survive: notes are stored verbatim, lightly cleaned of filler, never paraphrased, and come from talking to the assistant, not a journal screen.
The compound lookup runs under one rule from the prompt: if it is not confident about a field, return null. Do not guess, estimate, approximate or infer. A null field is useful. An invented number is a serious error. Every AI-produced field is stamped AI-sourced and shown as unverified. Every half-life shows where it came from, and today that source is the app's own curated reference, not an official label. The field is built to carry an FDA-label citation once one is attached.
The reference holds 651 curated compounds. All carry a redose interval and a food rule, 625 carry a half-life, and dose ranges, separation rules and interactions are filled in where the reference has them. Empty is a real answer. Your vial gets the same standard: sealed expiry and beyond-use date stay separate, the use-by is whichever comes first, and the app never invents a BUD, so enter neither and freshness reads as unknown.
The language model never discovers anything about your body. Code runs the comparisons and hands over only what clears a threshold. A rising feeling needs at least six events, a fifty percent rise and two more occurrences. A time-of-day cluster needs at least five reports of the same feeling, with at least four of them, and at least half, inside a three-hour band. A recovery trend needs five days and a ten-point drop. Below the line nothing is said and no notification goes out. The check-in is screened after it is written, so dose-change, start-or-stop and diagnosis language falls back to the plain computed sentence.
WHOOP brings recovery, HRV as RMSSD, resting heart rate, SpO2, skin temperature, sleep and strain on signature-verified webhooks: near-real-time push in minutes, not a live readout. Oura brings readiness, sleep stages, average HRV, lowest heart rate, activity and stress, polled rather than pushed: a pull when you connect, then a Sync now button in Settings. There are deliberately no Oura webhooks: the handshake could not be confirmed against live docs. Strava imports activity history. Garmin is a watch app for today's schedule and a dose from the wrist. Two devices on one day stay two rows: averaging two disagreeing numbers invents a third that neither measured.
A free account gives you 25 cabinet items, 60 label or compound scans a month, 40 assistant messages a day and 60 hand-logged workouts a month. Wearable-synced workouts do not count against it. Those limits went up on 15 August 2026 so a real week of use fits inside them.
A compound lookup spends a scan, and a protocol plus your supplements clears 25 items fast. The first paid step removes the cabinet and workout caps, lifts scans to 200 a month and the assistant to 100 a day. The step above makes scans unlimited and the assistant 400. Even the top step keeps a ceiling, because an unbounded assistant is an unbounded bill. Plan names are console-set, there are more than two paid steps, and prices come live from Stripe, so check the app: the first paid step was listed at $2.99 a month at the time of writing.
Everything you log goes to Firestore on Google Cloud in real time. Once you sign in there is no local-only mode. Every assistant turn sends your last 12 messages plus a context bundle of your real data, including verbatim notes, to Gemini. Know that before you type a compound name in.
What never travels: ad pixels get three standard event names and nothing about health, billing holds a Stripe customer id, a subscription id, a tier and who paid on a gifted plan, and OAuth tokens are unreadable by every client, including yours. This is a consumer wellness product, not a HIPAA covered entity, and platform admins have cross-account read by design: they read, and only you and a caregiver you consented to write.
Yes, and the rails are in the code rather than in a disclaimer. The assistant's hard rules forbid dosing advice, diagnoses, and any instruction to start, stop or change a medication, and it has no hands of its own: everything it wants to record arrives as a card you tap to apply. The morning check-in goes further and is screened after it is written, so dose-change, start-or-stop and diagnosis language falls back to the plain computed sentence. One thing it will do, so you know it up front: ask it a goal question and it can relay what a named public source has said about a supplement, always with the source attached, never about a prescription medication. You decide the protocol. The app records it.
Only if the reference does, and it tells you where the number came from. The bundled catalog holds 651 compounds, 625 of them with a half-life, and every half-life on screen carries a source chip that today reads WBT reference, meaning a curated reference rather than an official label. If your compound is not in it, the AI lookup runs under an explicit rule: return null rather than guess, because an invented number silently corrupts every timing calculation drawn from it, and anything it does return is stamped AI-sourced and shown as unverified until you check it. Plenty of research peptides come back empty, and that is the correct result.
You set the item up once with the category Peptide and the delivery method Injection (SubQ), then log doses against it with the amount you actually gave, the exact time, and a note. A day where you took more or less is recorded as a titration: a multiplier plus a reason from ten fixed options, clamped between 0.05x and 10x, which never rewrites your standing dose. Zero is not offered, because a dose of nothing is a skip rather than a smaller dose, and a skipped dose is recorded by its absence, which is how the adherence view counts it.
No, and it will not imply it either. Code finds the co-occurrence and thresholds hold it back: a recovery trend needs at least five days and a ten-point drop before it is mentioned at all, a time-of-day cluster needs five reports of the same feeling with four of them inside a three-hour band, and the language model only phrases what the arithmetic already produced. Below the line it says nothing rather than reaching. What you get instead is a timeline where the injection, the titration, the felt effect and the WHOOP or Oura reading sit on the same day, so you can hand a clinician a record instead of a recollection.
Nothing you log is published or shared anywhere. Your data lives in Firestore on Google Cloud, and each assistant turn sends your last 12 messages plus a context bundle of your real data, including your verbatim notes, to Gemini so it can answer, which you should know before you type a compound name into it. Ad pixels receive three standard event names and never anything about health. Billing stores a Stripe customer id, a subscription id and a tier, plus who paid when someone gifts a plan, with no line items and nothing about what you track. Platform admins have cross-account read access by design, so the accurate sentence is this: admins can read, and only you and a caregiver you consented to can write.
25 cabinet items, 60 label or compound scans a month, 40 assistant messages a day, and 60 hand-logged workouts a month, with no card required. Workouts synced from a wearable never count against the workout limit. Those are the shipped defaults and they can be adjusted from the console, so the app is the live answer. If you want to look before creating an account, guest mode stores everything in your browser's local storage and never writes to the server.
WorldsBestTracker is a record-keeping tool. It is not a medical device, it does not diagnose,
and it does not tell anyone what to take. Always talk to your own clinician about your treatment.
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