Track Your Mounjaro Injections Step by Step
Six titration steps, one app. See how every Mounjaro dose change affects your weight, appetite, and energy.
Tirzepatide (Mounjaro) — Weekly GIP/GLP-1 Injection
Regimen is the Mounjaro tracker app for people who want clarity on their tirzepatide journey. Mounjaro's six-dose titration schedule means your body responds differently at each level — Regimen captures it all. Log every injection, track your weight at each dose, monitor GI side effects, and see exactly when your medication delivers the most impact. Regimen connects your doses to health data from Apple Health or Google Health Connect, with PK modeling built on published pharmacokinetic data and FDA prescribing information. Free — every feature unlocked for your first medication. No paywall, no trial, no credit card. 4.9-star rating on iOS and Android.
Mounjaro and Zepbound are both tirzepatide — same molecule, different brand. If you want the full picture across brand and compounded forms, see the tirzepatide tracker. This page focuses on Mounjaro specifically.
Mounjaro is powerful — but the pen system is confusing.
Dual agonist means dual complexity:
Keeping track of which pen strength you're on across 6 different dose levels (2.5 to 15 mg)
Remembering your exact injection day each week when life gets busy
No easy way to see whether your weight loss is from the medication, diet changes, or both
Dose with precision
Regimen handles the dose math so you don't have to, including compounded vial conversions.
Compounded dose calculator
Using compounded semaglutide or tirzepatide from a vial? Input your vial size, bacteriostatic water volume, and target dose. Regimen tells you exactly how many units to draw.
Never miss a dose. Stay on schedule.
Stay consistent with zero effort. Regimen supports weekly injections, dose-step changes, and any schedule your medication needs, with smart reminders that actually help.
Every schedule you need
Weekly · specific days · split-week · every X days · twice daily · as-needed. Injections, pills, sprays. Your routine, your way.
Dose-step management
Log every step-up in your dose schedule with the date. When something shifts a week after a step, you can see it on the timeline instead of guessing.
See what's actually working
Correlate every dose and step-up against real health data. Stop guessing what's actually moving the needle for you.
Auto-sync from Apple Health & Google Health Connect
Weight, body fat, sleep, resting heart rate, and blood pressure flow in automatically. No manual logging required.
Log the signals your labs miss
Log energy, libido, sleep, and recovery alongside your numbers. See the response labs miss between pulls.
Correlate medications with health trends
Stepped up your dose three weeks ago? See exactly how your weight, energy, and side effects responded. Every dose change is overlaid on your health charts.
Know what's in your system
See estimated concentration curves for your compounds in real time. Know if you're at peak, trough, or steady state without waiting for labs.
Pharmacokinetic modeling for 150+ compounds
Regimen uses half-life data to model absorption, peak levels, and decay for every dose you take. See how levels build up over multiple doses.
Peak, trough & steady state visibility
Understand where you are in your dosing cycle at any moment. See projected future levels based on your current schedule.
Why tracking Mounjaro matters
6 dose tiers, zero confusion
Mounjaro's 2.5 → 5 → 7.5 → 10 → 12.5 → 15 mg schedule is the most complex GLP-1 dose progression. Regimen tracks exactly where you are.
GIP + GLP-1 dual action insights
Mounjaro's unique dual mechanism means different response patterns than pure GLP-1s. Track your specific response curve over time.
Apple Health correlation
Automatically overlay your weight, body fat, and activity data against dose changes to see the real impact of each step-up.
Related Tools & Guides
What Regimen Tracks for Mounjaro
Why people are switching to Regimen
"I finally feel in control of my weight loss journey. The photo comparison feature is addictive. Seeing my progress next to the tracking data motivates me way more than just the number on the scale."
Sarah K., GLP-1 User
"Started Zepbound a few months ago and needed something to track my doses and weight. This app is perfect, reminders keep me on schedule, I can log my injections and see my progress all in one place. The progress photos feature is really motivating too."
Nooshnili, USA
Your data stays private
Your health data is stored securely. We never share, sell, or monetize your information. What you track is your business, not ours.
See what's actually working
Regimen's Signals feature watches your check-ins and tells you the pattern it finds: your food noise tends to creep back around day 5 of your Mounjaro week, or your energy dips as the dose wears off. It's not a summary of what you logged: it's what actually changed.
How Regimen compares to Shotsy, Glapp, and MeAgain for Mounjaro tracking
| App | Platforms | Multi-Compound | Med-Level Curves | Reconstitution Calc | Health Sync | Free Tier |
|---|---|---|---|---|---|---|
Regimen | iOS + Android | GLP-1 + peptides + TRT | Free | Built-in | Apple Health + Google Health Connect | One compound free |
Shotsy | iOS + Android | GLP-1 only | Premium ($9.99/mo or $39.99/yr) | No (pen-focused) | Apple Health (paid) | Freemium |
Glapp | iOS + Android + web | GLP-1 only | Free (PK curves) | No | Apple Health + Health Connect (Android) | Free |
MeAgain | iOS + Android | GLP-1 only | Yes (estimated view) | No | No (not advertised) | Freemium |
Feature coverage based on publicly available app descriptions and pricing as of July 2026. See each app's App Store listing for current details.
Frequently Asked Questions
How do I log Mounjaro by pen strength across the six titration steps?
Select the pen (2.5, 5, 7.5, 10, 12.5, or 15 mg) and confirm the injection. The app stores every titration step with timestamps, so you can see exactly when each new dose started and what changed in your weight, appetite, and side effects after.
Can Regimen track both branded Mounjaro and compounded tirzepatide?
Yes. Branded Mounjaro logs by pen strength. Compounded tirzepatide logs by mg per dose since vial concentrations vary by pharmacy. The dose calculator handles both, and your history stays continuous if you switch between them.
Does Regimen track HbA1c and glucose on Mounjaro?
Yes. CGM data (Dexcom, Libre) syncs via Apple Health or Google Health Connect, and fingerstick readings can be entered manually. HbA1c, fasting glucose, and time-in-range plot against your Mounjaro dose timeline on a single chart.
What Mounjaro side effects can I log?
GI symptoms (nausea, vomiting, diarrhea, constipation, sulfur burps, reflux), plus fatigue, sleep quality, mood, appetite intensity, food aversion, and the food-stuck feeling. Custom markers cover injection-site reactions or birth control backup windows after each titration step.
How does Regimen compare to Shotsy, Glapp, or MeAgain for Mounjaro tracking?
See the comparison table above. Short version: those apps are GLP-1-only and treat Mounjaro mostly as a weight-loss log. Regimen handles the T2D side (glucose, A1c, full lab integration) alongside the weight tracking, plus any other compound in your stack.
Can I track lab work and progress photos alongside Mounjaro doses?
Yes. Labs plot on a long-term trend with your dose history overlaid, and progress photos store with timestamps so you can scrub through visible body composition changes across each titration step.
Is there a free Mounjaro tracker in Regimen?
Yes. The free tier covers one compound, including Mounjaro, with full dose logging, side effects, weight sync, glucose logging, and lab tracking. Pro ($4.99/month) unlocks multi-compound stacks and the Signals pattern engine.
Does Regimen treat Mounjaro and Zepbound the same way?
The underlying compound is identical (tirzepatide), so the math and PK curves match. The difference is framing: the Mounjaro view surfaces T2D markers (glucose, A1c) more prominently, while Zepbound emphasizes weight trajectory and body composition. Your data flows the same way regardless.
Stop guessing. Start optimizing.
Your GLP-1 routine deserves better than a notes app and a calendar.