Companion does the syringe math, reminds you when to inject, tracks every vial, supply and cycle, reads your bloodwork, and reorders before you run out. The catalog you shop is the catalog you log — buy and track in one place.
A push before every scheduled dose, named by peptide. Pick your lead time; one you've already logged won't nag.
Vial mg + BAC water become the exact units to draw, on a syringe you can drag. Injectable or oral.
43 peptides and blends, each with dose tiers, frequency, timing, route and cycle guidance built in.
Upload a lab PDF and it reads your markers, then tracks them against optimal ranges over time.
Every dose on a per-peptide month and year heatmap, today ringed, tinted by how you felt.
Rate each dose and tag effects. A 7-day trend shows how you're actually responding.
Suggests and records your spot, with a chart that nudges you to switch areas before one's overused.
Track multiple open vials with a draw-from switch; wipes, needles and BAC water count down as you go.
Forecasts your empty date and reorders in a tap, only when you're actually low.
Finished vials roll into a per-peptide ledger that nudges your next cycle on time.
A welcome walkthrough, a guided tour, and a paced how-to-inject demo get you going on day one.
A reconstitution guide draws the exact BAC-water fill, so your first vial is mixed right.
Buy the lab-tested catalog you track, without leaving. The catalog you shop is the catalog you log.
Subscribe so you never run out — 5% off your first order, more off every order after. Pause, skip or cancel anytime.
Local-first and offline — works with no account. Sign in to sync across devices and export anytime.
Already track in a spreadsheet? Upload .xlsx or .csv and we import past doses, skipping duplicates.

Drop in a lab PDF — LabCorp, Quest, Hone and Maximus are read automatically — and Companion grades your biomarkers against Goodtides optimal ranges, not just the lab's normal flag.
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Companion is a web app. Add it to your home screen once and it opens like any other app, full screen and offline.
What it is: a tracker and a calculator. It records what you enter (protocols, doses, injections, vials, supplies, schedules) and does the arithmetic of turning vial mg and water mL into syringe units. Catalog dosages shown alongside peptides are commonly cited research figures, included as a reference.
What it isn't: a medical service. Goodtides does not provide medical care, evaluate your condition, or advise on individual dosing. Peptides are research compounds, not FDA-approved drugs. Decisions about whether and how you use them are your own. Consult a licensed provider before starting, adjusting, or combining any protocol.
Free, installs in a tap, and waiting for you. Open it on your phone and add it to your home screen.