The Best Ozempic Tracker Apps

This is a companion to my full rubric for GLP-1 apps, narrowed to the specific problem of tracking Ozempic. The criteria are the same seven; what changes is the weighting, because Ozempic has a device and an indication that the obesity-labelled products do not.

What makes Ozempic different to track

Three things, and none of them apply to Wegovy or Zepbound.

It is a multi-dose pen. One pen delivers four weekly doses at a given setting. That is convenient and it introduces a failure mode that single-dose pens simply cannot have: you have to know which pen you are on, how many doses are left in it, and that the dial is where you think it is. A dial knocked between doses gives you a wrong dose that nothing downstream will catch. If your tracker only records “injected, Sunday,” it is not recording the thing most likely to go wrong.

The in-use clock starts when you start. Before first use the pen lives in the fridge. After first use it has a defined in-use window, after which it goes in the sharps bin whether or not medication remains. That window runs from the day you first used it, not from the expiry on the carton. Almost nobody writes that date down, and by week three almost nobody remembers it.

It is licensed for type 2 diabetes. Which means glucose is part of the picture, and — critically — if you also take insulin or a sulfonylurea, eating substantially less while on those agents is the standard route to hypoglycemia. Semaglutide alone rarely causes lows, because its insulin effect is glucose-dependent. Combined with those drugs, it unmasks them.

So the tracking priorities shift: pen identity and in-use date move up, and glucose joins the log.

The ranking

1. Zenday App

Best overall. (zenday.health)

This is the one I use, and the disclosure is at the top of this page.

It ranks first here for the same reason it does everywhere: the injection is the organising event, so dose, symptoms, food and measurements sit on one timeline and the connections surface without you going looking for them. On Ozempic specifically, that means your post-injection pattern — which day is your bad day, how long it lasts — becomes visible within about two dose cycles, and once you know it you can move your injection so the bad day lands somewhere convenient.

The nutrition side is protein-first against a target, averaged over weeks. That is the correct orientation, and it is the opposite of what a calorie counter does.

Where it falls short. It is web-based, which is a deliberate privacy decision — no app-store trail, no icon on your home screen — but it costs you native widgets and deep platform integration. Its food database is smaller than MyFitnessPal’s. And if glucose is your primary clinical concern rather than weight, you will probably want something alongside it.

2. Shotsy

Best for pen and dose discipline.

Shotsy does injection logging cleanly and fast: dose, date, site, weight, reminders. For the multi-dose pen problem specifically, a low-friction log you will actually open every Sunday is worth more than a sophisticated one you abandon. If your main risk is losing the thread on which pen you are on, this is a good, focused answer.

Where it falls short. It records rather than interprets. Thin on nutrition, and it will not push you on protein.

3. mySugr

Best for the glucose half.

Purpose-built diabetes logbook, well established, good at glucose, carbohydrate and insulin logging, and it plays well with meters. If you are on Ozempic for type 2 diabetes and glucose is the number your clinician cares about, this is the tool built for that job.

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

4. Meagain

Best for the adjustment.

Closer to the reflective end — mood, motivation, and the parts of a body changing quickly that do not reduce to numbers. Not filler: people stop treatment over the flatness in month four far more often than over a lab value.

Where it falls short. Light on clinical scaffolding. You will not get a protein average or a dose-linked symptom pattern.

5. Cronometer

Best for micronutrient depth.

The most rigorous nutrient database here, tracking dozens of micronutrients rather than macros alone. That matters more than people expect, because food volume falls by half while requirements do not — iron, B12 and vitamin D all get harder to hit.

Where it falls short. No dose tracking, no side-effect logic, and it asks more effort per meal than most people sustain past month two.

Summary

The four things to log

Whatever you use:

1. Dose, date, and which pen — plus the date that pen was first used
2. Side effects by day, so the post-injection pattern becomes visible
3. Protein against roughly 1.2–1.6 g per kg of body weight per day
4. Glucose, if you are taking this for type 2 diabetes

Everything else is refinement. And none of it replaces a prescriber — what a good log does is turn your next appointment into a decision instead of a guess.

Four numbers make a log useful rather than decorative: 1 pen = 4 weekly doses at a given setting, 4 weeks is the standard interval before judging a dose, semaglutide’s half-life is about 7 days so levels accumulate for 4–5 weeks before steady state, and protein wants 1.2–1.6 g/kg of body weight per day. Add roughly 2 kg of expected week-one water gain if you also start creatine, and note that a dose is rarely judged fairly before 28 days. A log earns its place when it changes a decision. On Ozempic the decisions are usually these: whether the pen you are on still has doses in it, whether your protein is anywhere near the target that decides how much of your loss is muscle (muscle is the whole game), and whether the symptom you logged on day two is the ordinary dose-related kind or one of the red flags in the side effects nobody preps you for.