Semaglutide tracker app: weekly jab, vial or daily tablet in one record
Short answer: PepLevel is a semaglutide tracker app for iPhone, coming soon to the App Store. It tracks semaglutide however you take it: a weekly Wegovy or Ozempic pen, a vial, or a daily tablet such as Rybelsus, where there is no injection site to log. It also draws an estimated level curve from your own doses and semaglutide's half-life of about a week. The free version tracks one medication.
Same medicine, three very different routines
Semaglutide is the active ingredient in Wegovy, Ozempic and Rybelsus, and in the US some people use compounded semaglutide from a vial. What a day looks like depends far more on the form than the name.
| Form | How often | What to track |
|---|---|---|
| Wegovy or Ozempic pen | Once a week, same day | Dose step, injection site, doses left in the pen |
| Compounded vial (US) | As your prescriber directs | Volume for each dose, what is left, first-use date |
| Rybelsus tablet | Once a day | That you took it, and the time, with no site |
In the US, Wegovy is also approved as a once-daily pill, so the daily routine is no longer only for people with type 2 diabetes.
Weekly pens
Wegovy and Ozempic are weekly injections under the skin, usually in the stomach area, thigh or upper arm. Both climb through dose steps over the first months, set by your prescriber, and each strength comes in its own pen. The UK Ozempic leaflet says an unused pen holds four doses. The questions a tracker answers here are simple: which day, which step, which side last time, and how many doses are left.
Daily tablets
Tablets swap the weekly question for a daily one. The Rybelsus leaflet says to take the tablet on an empty stomach with a sip of water, up to 120 mL, and then wait at least 30 minutes before eating, drinking or taking other tablets. The US Wegovy pill also comes with a 30-minute wait. A morning reminder and a one-tap "taken" record answer "did I take it today?" before breakfast. There is no site to rotate.
Vials
With a vial, you measure the dose yourself as a volume. The FDA points out that compounded drugs are not FDA approved and have not been reviewed for safety, effectiveness or quality, and that it has had reports of people measuring the wrong amount. It also advises throwing multi-dose vials away 28 days after first use. If a volume ever looks wrong, check with your pharmacist before injecting.
What the level curve shows
The Ozempic prescribing information gives semaglutide a half-life of about 1 week, and says it stays in the circulation for about 5 weeks after the last dose. With weekly jabs, each dose lands as the last one halves, so levels build over the first weeks and then settle into a weekly wave. With a daily tablet the rise from each dose is smaller and more frequent. A curve built from your own logged doses turns that into a picture, including what a late or missed dose did. It is an illustrative estimate from published averages, never a blood level.
If you move from one form to another, for example from a pen to tablets, your prescriber will explain how to switch. The useful thing for you is one record that carries across.
How PepLevel handles it
Add semaglutide from the compound library and set it up the way you take it. For a pen or vial that is a weekly schedule, your prescriber's titration plan and your injection day. For a tablet, choose the oral route and a daily schedule with the reminder time you want. Oral medicines skip injection sites, so there is nothing extra to fill in. PepLevel never suggests a dose or a step. It reminds you against the plan you entered.
Save your pen or vial as a supply. A pen follows its own fixed dose setting. A vial takes its amount and liquid volume, and PepLevel shows the planned dose from your plan as mL, or cc in the US, next to the milligrams. Each logged dose comes off that supply, with a reorder reminder 14 days ahead by default.
The level curve uses semaglutide's published half-life and your logged doses, with 7, 30 and 90 day views and a marker for now, and it is part of the free version. Weight, side effects and progress photos sit alongside. Changing form keeps one history, so a year on pens and a month on tablets read as one story.
The free version tracks one medication. Pro is £5.99 a month, £24.99 a year with a 7-day free trial, or £69.99 lifetime. No account, and your data stays on your iPhone.
Common questions
Is there a free semaglutide tracker app?
PepLevel's free version tracks one medication, including the level curve, so a single semaglutide plan as a pen, vial or tablet is covered. It is coming soon to the App Store for iPhone.
Can I track Rybelsus or the Wegovy pill in PepLevel?
Yes. Set the medication as oral with a daily schedule and a reminder time. The app skips injection sites for oral medicines and logs each tablet as taken or skipped.
Why does my semaglutide level curve rise over the first weeks?
With a half-life of about a week, each dose adds to what is still there from earlier ones, so levels build before settling. PepLevel's curve shows this as an illustrative estimate, not a measured level.
Semaglutide, however you take it
Weekly pens, vials or daily tablets, with an estimated level curve. Coming soon to the App Store. Coming soon to the App Store.
Get PepLevelMedical disclaimer: this guide is general information, not medical advice. PepLevel does not sell, source or recommend any medicine and never works out a dose. Half-life, tablet and vial details are summarised from the UK leaflets, the Ozempic prescribing information and FDA statements at the time of writing. Always follow your prescriber's instructions, and ask them, your pharmacist or NHS 111 if you are unsure about anything. PepLevel is a logging and reminder tool only.