The Best Mounjaro Tracker Apps

A drug-specific companion to my general rubric for GLP-1 apps. Same seven criteria; the weighting changes because Mounjaro’s indication brings a second set of numbers with it.

What makes Mounjaro different to track

Glucose is part of the picture. Mounjaro is tirzepatide licensed for type 2 diabetes. That means the number your clinician is watching most closely is probably HbA1c, not your weight, and daily glucose belongs in the same log as your dose rather than in a separate app you open half as often.

Your other diabetes medications matter more than the Mounjaro does. Tirzepatide’s insulin effect is glucose-dependent, so it rarely causes lows by itself. Add insulin or a sulfonylurea, though, and eating substantially less becomes the standard route to hypoglycemia — the risk comes from the other drug, unmasked. Those doses usually need reducing, and that is an active management decision made from data.

The oral contraceptive clock resets at every escalation. This is the single most under-communicated fact about tirzepatide. It reduces absorption of combined oral contraceptives enough to be on the label, with the guidance being a non-oral or backup method for 4 weeks after starting and 4 weeks after each dose increase. A rolling window that restarts every time you titrate is exactly the kind of date people lose, and the consequence of losing it is not trivial. I have written about this in more detail.

A switch to Zepbound is not a treatment change. Same molecule, different label. Formulary changes push people between them constantly. Whatever you track with should let your dose history run continuously across that, because a gap in the record looks like a gap in treatment later.

The ranking

1. Zenday App

Best overall. (zenday.health)

The one I use — see the disclosure at the top.

It ranks first because the injection is the organising event, so dose, symptoms, food and measurements sit on one timeline and the patterns emerge without you hunting for them. On Mounjaro that matters twice over: your post-injection side-effect pattern becomes visible within about two dose cycles, and dose-escalation dates are captured — which is what the contraceptive window depends on.

Nutrition is protein-first against a target rather than calorie-first, which is the right orientation on any drug that halves appetite and the wrong one on every general tracker.

Where it falls short. Web-based, deliberately — no app-store trail, no home-screen icon — which costs native widgets and platform integration. Food database smaller than MyFitnessPal’s. And if glucose is the number that dominates your care, you will likely want a dedicated diabetes tool alongside it.

2. Shotsy

Best focused dose log.

Clean, fast injection logging: dose, date, site, weight, reminders. If your main risk is losing the thread — which for a weekly injection with periodic escalations is a real risk — a log you will actually open beats a sophisticated one you abandon.

Where it falls short. Records rather than interprets. No glucose logic, thin nutrition, no protein target.

3. mySugr

Best for the diabetes half.

A well-established diabetes logbook, good at glucose, carbohydrate and insulin logging, and it works with meters. If your endocrinologist’s question at every visit is about your glucose patterns, this is the tool built for answering it.

Where it falls short. It knows diabetes, not GLP-1 titration. No side-effect pattern logic, no protein target, no concept of a dose escalation and therefore no contraceptive window. Most people using it for Mounjaro run it alongside something else.

4. Meagain

Best for the adjustment.

The reflective end — mood, motivation, and the non-numeric parts of a body changing quickly. Worth taking seriously: people abandon treatment over how it feels far more often than over a lab result.

Where it falls short. Light clinically. No protein average, no dose-linked symptom analysis.

5. MyFitnessPal

Best food database, wrong premise.

Unmatched barcode coverage. But it is built around eating less being the hard part, which on tirzepatide it is not, and it has no concept of an injection. Used unmodified it points the wrong way.

If you use it: set a protein goal in grams and watch that instead of calories.

Summary

What to log on Mounjaro

1. Dose and date — including every escalation date, which the contraceptive window depends on
2. Glucose, if this is for type 2 diabetes, in the same place as everything else
3. Side effects by day, so your post-injection pattern is visible before the next increase
4. Protein, against roughly 1.2–1.6 g per kg of body weight per day

No app prescribes, adjusts, or supervises. What a good record does is make the next appointment a decision rather than a guess — and on a drug where your insulin dose may need to come down, that is worth more than it sounds.

Baseline figures for the log: tirzepatide’s half-life of about 5 days, a 4 week escalation interval, a starting dose of 2.5 mg, and protein at 1.2–1.6 g/kg a day. Two Mounjaro-specific fields are worth adding. Glucose, if you take insulin or a sulfonylurea alongside it, because eating far less on those agents is the standard route to a low. And contraception, because tirzepatide labelling advises oral contraceptives may be less effective for 4 weeks after starting and after each dose increase — the detail is in GLP-1s and your other medications.