Track Your Zepbound Weight Management Routine
Built for tracking tirzepatide for weight loss — log doses, monitor body composition, and see your results at every step.
Tirzepatide (Zepbound) — Weekly Weight Loss Injection
Regimen is the Zepbound tracker app for people using tirzepatide specifically for weight management. Zepbound is the weight loss-approved version of tirzepatide — and tracking your results through its six-step titration is essential for understanding what's working. Regimen logs every dose, tracks your body composition changes, monitors side effects, and correlates your health data to your dosing timeline. See exactly how Zepbound is reshaping your body — with half-life data sourced from published clinical studies and FDA prescribing information. Free — every feature unlocked for your first medication. No paywall, no trial, no credit card. 4.9 stars on the App Store.
Zepbound and Mounjaro are both tirzepatide — same molecule, different brand. If you want the full picture across brand and compounded tirzepatide, see the tirzepatide tracker. This page focuses on Zepbound specifically.
What to track on Zepbound
- Current dose step and the date you started it
- Pen used (log the date for inventory tracking)
- Weight (same time weekly, ideally morning fasted)
- Waist circumference (monthly)
- GI side effects: nausea, constipation, indigestion, 1-10 severity
- Appetite suppression rating (1-10)
- Energy and sleep quality
- Injection site rotation (abdomen, thigh, upper arm)
- Missed doses (log these explicitly so you can correlate side-effect rebounds)
FDA-approved Zepbound dose schedule
| Weeks | Dose | Notes |
|---|---|---|
| 1-4 | 2.5mg | Starting dose, no weight loss expected, side effect adaptation |
| 5-8 | 5mg | First therapeutic dose, weight loss begins |
| 9-12 | 7.5mg | Continued loss, common to hold here if responding well |
| 13-16 | 10mg | Standard maintenance for many users |
| 17-20 | 12.5mg | Higher dose if response is plateauing at 10mg |
| 21+ | 15mg | Maximum FDA-approved dose |
Common mistakes when tracking Zepbound
- Not logging which pen you used or when. Pen inventory matters because each pen is a fixed dose.
- Logging weight inconsistently (different time of day, different hydration).
- Skipping the dose history once you are stable. You will need that history if you plateau later.
- Not noting side effect severity. This is the data that informs whether to hold a dose versus step up.
- Forgetting to log skipped doses. They happen. Log them so the timeline stays honest.
Frequently asked questions
Should I track Zepbound or tirzepatide?
Same compound. The tracker name does not matter; what matters is logging dose and date consistently. Regimen's Zepbound and Mounjaro trackers use the same underlying tirzepatide tracking. Pick whichever matches your prescription.
What if I miss a Zepbound dose?
Take it within 4 days of the missed dose if possible. If more than 4 days have passed, skip it and resume your normal schedule. Log the miss in Regimen so you can correlate any side-effect rebound with the gap.
How long should I hold each dose step?
FDA labeling calls for 4 weeks per step. Many providers hold longer (6-8 weeks) if side effects are tough or if you are responding well at a lower dose.
Does the pen need to stay refrigerated?
Yes, between 36 and 46°F refrigerated. Once you have started a pen, it can stay at room temperature (up to 86°F) for up to 21 days. Log the opening date.
When will I see weight loss on Zepbound?
Response varies widely. In Lilly's clinical trials, most participants saw measurable weight loss during the early therapeutic doses, with continued loss over the following months. Track your own weight trend so you can see how you're personally responding, not just what an average curve says.
Zepbound is new. Your tracking shouldn't be guesswork.
Starting a new weight loss medication comes with real friction:
Navigating a brand-new dose schedule when there's less community knowledge to draw from compared to Ozempic or Mounjaro
Wondering if your rate of weight loss is normal for Zepbound specifically, versus other GLP-1s you've researched
Managing injection day consistency when you're still building the weekly habit
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 Zepbound matters
Build your own data
Zepbound (tirzepatide) is newer, meaning less long-term community data exists. Your own tracked history becomes your most valuable reference.
Step-up confidence
Same 6-dose tirzepatide schedule as Mounjaro. Regimen tracks it so you step up at the right time, every time.
Weight + body composition
Zepbound's dual GIP/GLP-1 action can affect body composition differently. Track weight and progress photos together for the full picture.
Related Tools & Guides
What Regimen Tracks for Zepbound
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
How we built the Zepbound tracker
Zepbound is tirzepatide branded for weight loss (the same active ingredient as Mounjaro, which is branded for type 2 diabetes). The dose system is identical: six pen strengths (2.5, 5, 7.5, 10, 12.5, 15 mg), one dose per pen, with FDA labeling calling for a step-up roughly every four weeks. The complexity isn't the math, it's catching how each step-up actually moves weight, body composition, and side-effect patterns over time.
Regimen's Zepbound tracker is built around that step-up question:
- Pen-strength selector: every dose change logs the new pen strength with the date. Your history shows every step from 2.5 to 5 mg, 5 to 7.5 mg, and so on.
- Side-effect tracking across 50+ markers: nausea, vomiting, constipation, diarrhea, sulfur burps, the food-stuck feeling, fatigue, mood, sleep, appetite, energy, plus any custom marker.
- Weight trend overlay: dose changes plot on the same chart as your weight, so you can see how each step-up changed the trajectory.
- Progress photos: optional weekly photo log stored locally. Useful for noticing body composition changes that don't show up on the scale.
- Apple Health and Google Health Connect: weight, body fat percentage, resting heart rate, sleep, and blood pressure auto-sync if you have a wearable or smart scale.
- Lab tracking: HbA1c, fasting glucose, lipid panel, hematocrit. Each lab pull plots on the dose timeline so trends are visible.
- Mounjaro compatibility: if you've been switched between Zepbound and Mounjaro (or you fill whichever is in stock), the app treats them as the same compound so your dose history stays continuous.
- Multi-compound support: most Zepbound users on Regimen also track at least one other compound (TRT, a peptide, HRT, supplements). The app handles them all together instead of forcing you into a GLP-1-only silo.
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 Zepbound 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 Zepbound 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 Zepbound by pen 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 each new pen lines up against weight, appetite, and side effects in your timeline.
Can Regimen track both branded Zepbound and compounded tirzepatide?
Yes. Branded Zepbound logs by pen strength. Compounded tirzepatide logs by mg per dose since vial concentrations vary by pharmacy. Switching between them keeps your dose history and weight trend continuous.
Will Regimen pull in my weight and body composition automatically?
Yes. Weight, body fat percentage, BMI, lean mass, and resting heart rate sync via Apple Health or Google Health Connect. The weight trend plots directly under your Zepbound dose timeline so each titration step lines up with what your scale actually did.
What Zepbound 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 Zepbound tracking?
See the comparison table above. Short version: those apps are GLP-1-only logs. Regimen handles Zepbound alongside any other compound, models blood levels with published PK data, and includes lab correlation on the free tier.
Can I track progress photos and body recomposition on Zepbound?
Yes. Progress photos store with timestamps and dose-step labels so you can scrub through visible changes across each pen. Body fat percentage and lean mass from a smart scale plot on the same chart as weight.
Is there a free Zepbound tracker in Regimen?
Yes. The free tier covers one compound, including Zepbound, with full dose logging, side effects, weight sync, and lab tracking. Pro ($4.99/month) unlocks multi-compound stacks and the Signals pattern engine.
Does Regimen treat Zepbound and Mounjaro the same way?
The underlying compound is identical (tirzepatide), so the math and PK curves match. The Zepbound view emphasizes weight trajectory and body composition; the Mounjaro view surfaces HbA1c and glucose more prominently. Your data flows the same way either side.
Stop guessing. Start optimizing.
Your GLP-1 routine deserves better than a notes app and a calendar.