Home / Guides / GLP-1 tracker app: what to look for, and how PepLevel does it

What a GLP-1 tracker app is for

Mounjaro, Zepbound, Wegovy and Ozempic are simple on paper: one jab or shot, once a week. In practice the week fills up with small questions. Did I take it on Thursday or Friday? Was it the left side last time? Is there enough in this pen to get me to the next prescription? Why was Saturday so rough?

A notes app or calendar can hold some of that, but it cannot connect the pieces. A tracker built for injections can: every dose, weight reading and side effect sits on the same timeline, so patterns show up on their own.

The checklist: what to look for

1. Reminders that fit your real schedule

Weekly is the common case, but plenty of people use daily medicines like Saxenda or Rybelsus, or inject every few days. The app should handle weekly, daily, every N days and specific weekdays, let you move a single dose without rewriting the plan, and let you log, snooze or skip straight from the notification.

2. A titration plan you enter yourself

Most GLP-1s start low and step up. A tracker should hold the plan your prescriber gave you and remind you when a step is due. It should never suggest a dose or tell you when to go up. That decision belongs to your prescriber.

3. Injection site rotation

The Mounjaro patient leaflet says to change your injection site each week, even if you use the same area. Memory is a poor record of which spot you used a fortnight ago. Look for an app that shows recent sites and suggests the next one.

4. An estimated level curve

Many people find it helpful to see roughly how much medicine is in their system across the week, because appetite and side effects often follow the same rhythm. Any curve is an illustrative estimate based on published half-lives, never a blood test. Check whether it is free or paid, and whether it works for every medicine you take.

5. Supply and reorder warnings

Running out mid-titration is stressful, especially when stock is patchy. A tracker that knows what is left in your pen or vial can warn you before you run short.

6. Side effects linked to doses

Logging nausea on its own is a diary. Logging it against the dose it followed, with a severity score, is evidence you can take to a review.

7. Something to show your prescriber

Appointments are short. A one-page summary of your medicines, current step, recent doses, weight trend and side effects saves ten minutes of scrolling.

8. Privacy you can check

This is health data. Ask whether the app needs an account, where your data is stored, and if you can export all of it. Read the App Privacy section on the App Store listing before you download.

Is there a free GLP-1 tracker app for iPhone?

Yes, several GLP-1 tracker apps have a free tier, but what is free varies a lot. Some keep dose logging free and charge for the level chart or the doctor report. Some are free but need an account for scheduling features. Before you commit months of history to an app, check exactly what the free version includes today, and whether the developer has said anything about what will stay free.

How PepLevel handles it

PepLevel is a private iPhone tracker for GLP-1s and other injectables. It was built around that checklist.

• Any GLP-1, and more. Pick your medicine from a searchable library (Mounjaro, Zepbound, Wegovy, Ozempic, Saxenda and others) or add a custom one. Other injectables, such as testosterone or a peptide, sit alongside it with their own schedules.
• Next dose, answered. Today shows when your next dose is due, with a one-tap Log button on dose day. Notifications let you log, snooze for an hour, skip or reschedule.
• Your titration plan. Enter the steps your prescriber gave you and see them on a timeline. The app reminds against the plan and never changes it.
• Site rotation. A grid of zones shows your suggested next site, recent sites and older ones, with history per site.
• Level curve for any compound with a half-life. View 7, 30 or 90 days with a now marker. It is labelled as an illustrative estimate, and it is free.
• Supply. Add your pen, vial or ampoule and PepLevel tracks what is left, forecasts when it runs out and reminds you to reorder (14 days ahead by default).
• Side effects and outcomes. Log 11 common symptoms or your own with a 1 to 5 severity. Progress shows the weight change and side effects in the 7 days after each dose.
• Prepare for appointment. A one-page PDF with your medicines, current step, recent doses, weight trend and side effects.
• No account. There is nothing to sign up for. Face ID lock, Apple Health sync and CSV export are in Settings.

Pricing. The free tier tracks one medication, level curve included. Pro is £5.99 a month, £24.99 a year with a 7-day free trial, or £69.99 once for lifetime access. Features never move from free to paid. PepLevel is coming soon to the App Store.

Common questions

What is the best free GLP-1 tracker app for iPhone?

It depends on what you need free. Compare whether the level chart, doctor report and more than one medication are in the free tier. PepLevel's free tier tracks one medication and includes the estimated level curve, with no account needed.

Can a GLP-1 tracker app tell me what dose to take?

No, and a responsible one will not try. Your dose and titration steps come from your prescriber. PepLevel stores the plan you enter and reminds you against it, but never suggests or changes a dose.

Does a GLP-1 tracker work for compounded or other injectables?

Many are limited to branded GLP-1s. PepLevel lets you add a custom medication and track other injectables alongside your GLP-1, each with its own schedule, site rotation and supply.

Every dose, site and step in one place

A private GLP-1 tracker with a free level curve and no account. Coming soon to the App Store.

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