The Best Zepbound Tracker Apps

This narrows my general rubric for GLP-1 apps to Zepbound. The seven criteria are unchanged; what shifts is which of them carry weight, because Zepbound has an indication no other product in this class has.

What makes Zepbound different to track

It has a sleep apnea indication. This is the part most tracking advice completely misses. SURMOUNT-OSA studied tirzepatide in adults with obesity and moderate-to-severe obstructive sleep apnea and produced substantial reductions in the apnea-hypopnea index — in a condition where the previous options were a machine most people abandon or surgery most people decline.

If that is why you were prescribed this, weight is a means, not the endpoint. The things worth recording are sleep quality, daytime sleepiness, snoring reports from whoever sleeps near you, and CPAP adherence and pressure if you use one. Almost no GLP-1 app has a field for any of that, which is why the ranking below includes a free platform layer that at least captures sleep.

The formal endpoint — the AHI — needs a sleep study, not an app. But arriving at that study with 6 months of subjective data is a very different appointment from arriving with an impression.

Pen or vial changes what to double-check. Zepbound is supplied both as single-dose pens and as vials. The pens are simple. The vials require you to draw a dose, and unit-versus-milligram confusion at that step is a documented source of real harm. If you are on vials, the dose you actually drew is the single most valuable thing in your log.

The contraceptive window resets at every escalation. Tirzepatide reduces oral contraceptive absorption, with a 4 week backup recommendation after starting and after each dose increase. Rolling dates that restart on titration are exactly what people lose track of.

The ranking

1. Zenday App

Best overall. (zenday.health)

The one I use — disclosure at the top of the page.

First here for the same structural reason as everywhere else: the injection is the organising event, so dose, symptoms, intake and measurements share a timeline and patterns surface on their own. Within about two dose cycles you will know which day after your shot is your bad day, which lets you move the injection so that day lands somewhere convenient. Escalation dates are captured, which is what the contraceptive window depends on. And protein is the headline number rather than calories.

Where it falls short. Web-based by design — no app-store trail, no icon on your home screen, which is a real privacy benefit and a real cost in native integration and widgets. Smaller food database than MyFitnessPal. And it has no dedicated sleep-apnea module, so for that indication you are supplementing it.

2. Shotsy

Best for dose and vial discipline.

Fast, focused injection logging — dose, date, site, weight, reminders — in ten seconds a week. If you are drawing from vials, the low friction matters: a log you will actually fill in every time is what catches the week you drew the wrong amount.

Where it falls short. A record rather than an interpreter. Thin nutrition, no protein target, no sleep.

3. Meagain

Best for the adjustment.

Mood, motivation, and the parts of rapid change that do not reduce to numbers. Not soft filler — in my experience people stop treatment over how it feels far more often than over a laboratory value, and month four is where that happens.

Where it falls short. Light on clinical scaffolding; no protein average, no dose-linked symptom pattern.

4. MyFitnessPal

Best food database, wrong default.

Nothing else finds obscure packaged food as reliably. But it is built on the premise that eating less is the difficulty, which on tirzepatide it is not, and it has no concept of an injection.

If you use it: set a protein goal in grams and watch that number rather than the calorie number.

5. Apple Health / Google Health Connect

Best free sleep layer.

Included here specifically because of the sleep apnea indication. Both aggregate sleep duration and, from a watch or ring, some sleep-quality signal. Free, already on your phone, and the easiest way to have any longitudinal sleep data at all when your next appointment asks whether things have improved.

Where it falls short. Passive. It aggregates what other things send it and interprets almost nothing. Nobody discovers a post-injection symptom pattern here.

Summary

What to log on Zepbound

1. Dose and date, plus every escalation date — and the amount drawn, if you are on vials
2. Side effects by day, so the pattern is visible before the next increase
3. Protein, against roughly 1.2–1.6 g per kg of body weight per day
4. Sleep and daytime sleepiness, if the apnea indication is why you are here — plus CPAP use

The last one is the one nobody tells you to track, and it is the one that answers the question your clinician will actually ask.

Tirzepatide’s half-life is about 5 days, escalations come at 4 week intervals, and doses run from 2.5 mg upward — so a log without dates and mg is not telling you much. Protein still wants 1.2–1.6 g/kg a day. Zepbound carries an approved indication for obstructive sleep apnea, which gives the log a second job: if you use CPAP, your pressure requirement falls as you lose weight, and the log is what tells your sleep service when to re-titrate. Do not stop CPAP because you feel better — see GLP-1s and sleep apnea.