Everything in STACK Tracker starts with an item you choose to track. Once an item exists, the dashboard schedules its doses, the timeline shows where you are in a cycle, and — for reconstituted injectables — the calculator and vial inventory keep the math straight. Nothing is logged that you did not add yourself.
Adding something to track
From your dashboard, choose Add item and pick a category: supplement, vitamin, mineral, medication, injectable, or a custom item of your own. As you type a name, the form suggests matches from the compound library and pre-fills typical details for known compounds — you can adjust anything before saving.
You set the dose amount and unit, how often you take it, the reminder times, and a start date. For anything cycled, you add an end date too. Saving the item generates its dose schedule, and the schedule extends automatically as time passes.

How reminders work
Your dashboard groups the day’s doses into time-of-day blocks — morning, midday, evening, night — so today’s plan is always one glance away. Each dose can be logged with a single tap.
If you opt in, STACK Tracker can send browser notifications when a dose is due. Web notifications are best-effort: they fire reliably only while the site is open or installed to your home screen as an app. For always-on reminders, the mobile app — coming later, on the same account — is the better tool. You can also opt into a daily email summary of your schedule.

The reconstitution calculator
Many injectables arrive as a powder that you mix with bacteriostatic water before use. Getting the dose right means working out the concentration, the volume to draw, and how many doses a vial holds. The calculator does this for you: enter the vial size, the amount of water you are adding, your target dose, and your syringe size, and it returns the concentration, the volume per dose, and the doses per vial.
The result is drawn as a vial and syringe to scale, so you can see the fill level rather than just read a number. Guardrails warn you when a dose will not fit the syringe or when a concentration is impractical. It is general education — always follow the instructions from your prescription and pharmacist.

The AI assistant
The built-in assistant answers factual questions about the compounds you track — what they are, how they work, typical dosing ranges from published sources, half-lives, and reconstitution math. It cites sources where it can and is honest about uncertainty.
It is not a doctor. For anything personal — whether to start or stop something, whether a dose is right for you — it will tell you to consult a licensed physician rather than guess.
Cycling and protocols
Any item with a start and end date gets a protocol timeline showing the full duration, today’s position, and the days elapsed and remaining. For reconstituted injectables, vial inventory counts down the doses left in your current vial and warns you before you run low, so a reorder never sneaks up on you.