A Mounjaro tracker needs three things: a weekly reminder that survives a missed day, an injection-site record so rotation is not guesswork, and a history you can hand to a prescriber. In the UK, add a fourth. Supply routes change, so choose a tracker that is not tied to whoever prescribes or dispenses it.
What a weekly medicine asks of an app
Mounjaro is tirzepatide, given as a weekly injection. A weekly rhythm is easier to keep than a daily one right up until the week you are away, unwell, or simply out of routine, and then it is harder, because there is no daily habit carrying you. A missed Tuesday is not obvious the way a missed morning tablet is.
That is the first thing to test an app on. A reminder that appears once and disappears is a reminder you can miss while your hands are full. What you want is one that persists until the dose is actually recorded, and that lets you record it late without treating a late dose as an error to be corrected.
The second is the injection site. Rotation is part of the routine set out in the patient information supplied with the medicine, and it is exactly the detail that is impossible to reconstruct from memory a fortnight later. An app that shows where you went last time turns that into a glance.
The third is what happens at a review. A prescriber is trying to see a pattern across weeks, not a single day. A history that filters by kind and sorts by date, and that you can take out of the app, is worth more at an appointment than any chart.
The UK-specific part
NICE has published guidance on tirzepatide for managing overweight and obesity, and UK access runs through more than one door: NHS routes for those who are eligible, and private clinics and pharmacies for those who are not or who choose not to wait.
People move between those doors. Someone may start privately and move to an NHS route, or stay private and change pharmacy for reasons that have nothing to do with the medicine. None of that changes the treatment, but it can change the app, and that is where a record gets stranded.
So the UK question is less about which tracker has the longest feature list and more about whether it is attached to a seller. An app supplied by whoever dispenses your medicine works perfectly well until the day it does not.
How the main trackers handle a weekly injection
A chosen set of dimensions relevant to a weekly injectable routine, not an exhaustive feature comparison. Food-database depth is left out deliberately; it is better judged against a dedicated food logger. Every cell, including Veya's, is stated as recorded in the underlying research file; "unknown" means unverified, not absent.
| Feature | Veya | Shotsy | MeAgain | Glapp |
|---|---|---|---|---|
| Dose logging | Yes | Yes | Yes | Yes |
| Dose reminders | Yes | Yes | Yes | Yes |
| Escalating reminders | Yes | No | No | Not verified |
| Injection site rotation | Yes | Yes | Yes | Yes |
| Side-effect logging | Yes | Yes | Yes | Yes |
| Weight logging & charts | Yes | Yes | Yes | Yes |
| Data export | Yes | Yes | Not verified | Not verified |
| Estimated medication-level curve | No | Yes | Yes | Yes |
| Provider-neutral | Yes | Yes | No | Yes |
* Not verified means we could not confirm this either way from the app’s own published material. It does not mean the feature is absent.
Shotsy's estimated medication-level chart remains, in our view, the best implementation of that idea in the category, and for some people it is the whole reason to open an app at all. Glapp ships an Apple Watch app, which Shotsy does not. MeAgain is the broadest of the set and also sells GLP-1 medication alongside the tracker, which is worth weighing only against the supply question above rather than treated as a fault.
Our assessment is that none of these replaces a dedicated food logger, and it is usually better to pair one than to expect a tracker to do both.
Where Shotsy wins Estimated medication-level chart covering semaglutide, tirzepatide, liraglutide and dulaglutide. Supports CSV export.
Where MeAgain wins Integrated food logging with barcode scanning and fibre tracking. Apple Health integration.
Where Glapp wins Vial-level supply tracking. Clinical-trial and peer benchmarking.
What should I record between Mounjaro reviews?
The dose and the date, the injection site, any symptoms with roughly when they started and how long they lasted, and weight if you weigh. Dated notes made at the time are far more useful at a review than a recollection.
What do I do if I miss a dose?
Follow the patient information leaflet supplied with your medicine and speak to your prescriber or pharmacist. A tracker records what happened; it does not tell you what to do next, and you should be cautious of one that implies otherwise.
Will I lose my history if I change pharmacy or move to the NHS?
Not if your tracker is provider-neutral. If the app came from whoever dispenses your medicine, check whether you can export your record before anything changes.