Peak
Research & Tracking
Semaglutide & Tirzepatide Dose Tracker
GLP-1 protocols are unusual in that the schedule is a ladder: a weekly injection held at one dose for several weeks, then stepped up. Which rung you are on, how long you've been on it, and how the week after a step felt are the details that get lost first — and they're exactly the details worth having when you review progress or discuss it with a clinician.
Peak keeps the ladder, the injection day and your weight and symptom notes on one timeline, so a titration decision is made against a record instead of a guess.
Built for a stepped weekly protocol
Titration ladders
Store the step schedule for semaglutide or tirzepatide and see which step and which week of it you're currently in.
Weekly injection reminders
The next dose is calculated from your last logged injection, so the seven-day rhythm survives a shifted day.
mg or unit dosing
Log the way your pen or vial is labelled, with presets per compound so a unit count can't be recorded as milligrams.
Side effects on the timeline
Note nausea, appetite or energy against the date, and see whether it clustered after a dose or a step up.
Weight and measurements
Plot progress against your dose history rather than in a separate app that knows nothing about your protocol.
Bloodwork in context
Upload a lab report photo and Peak reads the values into the same record as your dosing history.
Mixing from a vial rather than using a pen? The reconstitution calculator converts vial strength and water volume into units on a syringe. If you also run testosterone, see the cypionate tracker.
Track the ladder, not just the shot
Set your titration plan once and Peak keeps the step, the weekly reminder, the side-effect notes and the weight trend together.
Works in any browser and installs to your iPhone home screen — no App Store download needed.
GLP-1 tracking questions
How do titration schedules for semaglutide and tirzepatide work?
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Both are stepped: you hold a starting dose for a set number of weeks, then move up, and the step you are on matters more than the calendar date. Peak stores the ladder as a titration plan, tells you which week of which step you're in, and flags when the next step is scheduled — so a dose increase is a deliberate decision rather than something you drift into.
Why does the injection day matter so much for weekly GLP-1s?
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Both compounds are dosed once weekly with a long half-life, so shifting your injection day repeatedly bunches or stretches the interval between doses. Peak calculates the next due date from your last actual injection and reminds you on that day, which keeps a seven-day rhythm even when life moves things around.
Should I track side effects alongside the dose?
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Nausea and appetite changes are the most commonly reported experiences and they tend to cluster around the days after a dose or after a step up. Because Peak timestamps the injection and your symptom notes on the same timeline, you can see whether what you felt lined up with a titration step or was unrelated.
Can I track weight and other metrics in the same place?
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Yes. Weight, waist and other metrics you log are plotted against your dose history, so the picture is dose, step and outcome on one chart rather than a scale app and a notes app that never talk to each other.
Does Peak handle doses measured in units or mg?
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Both. Pens and vials are labelled differently, so you can log in mg or in units, and Peak keeps the presets for the compound you selected — which avoids the classic error of entering a pen unit count as milligrams.
Peak is a personal tracking tool, not a medical device or pharmacy. It gives no dosing advice — titration decisions belong with your prescriber.