5.0 on the App Store

#1 GLP-1 Companion

Your GLP-1 journey, with a friend by your side.

PenPal keeps track of your shots, estimated medication level, protein & fiber, side effects and progress, so you can get on with feeling like yourself.

Download on the App Store See how it works

Free to download for iPhone.

PenPal home screen showing 1,131 of 1,800 calories eaten, macro progress bars and an Excellent nutrition score of 86.

Any brand, any routine

Works with every GLP-1

Brand-name or compounded, weekly shot or daily pill. Pick your medication and PenPal sets up the rest.

Ozempic®
Wegovy®
Mounjaro®
Zepbound®
Rybelsus®
Saxenda®
Trulicity®
Victoza®
Compounded semaglutide
Compounded tirzepatide
Any other GLP-1

Any schedule Weekly, daily, twice daily or a custom interval.
mg, mcg or units Log each dose exactly the way your label reads.
Shots or pills Pens, vials and tablets, with injection sites tracked when you need them.
Compounded, too Enter your vial’s concentration once and PenPal does the math.

How PenPal helps

Your whole GLP-1 week, in one friendly app.

Shots, levels, meals, the not-so-fun stuff and the wins. Here’s how PenPal keeps it all in one place.

01 Shot day

Shot day, sorted.

Log your dose in a couple of taps: medication, amount, time and injection site. Set a reminder and PenPal counts down to the next one, so the weekly ritual never sneaks up on you.

PenPal dose history listing weekly Ozempic injections at 1 mg and 0.5 mg.

02 Medication level

See your estimated medication level.

PenPal turns your logged doses into a curve that estimates how your level rises and fades between shots. It’s an estimate, not a lab result, and a handy picture to bring to your next appointment.

PenPal treatment screen with an Ozempic medication level chart, last 1 mg dose and next dose countdown.

03 Protein & fiber

Snap a meal. Hit your protein & fiber.

Take a photo of your plate and PenPal’s AI estimates calories, protein, fiber and macros, then scores the meal. You can edit anything it gets wrong. Protein and fiber are the golden rule on a GLP-1, and now they’re easy to keep an eye on.

PenPal meal analysis of a salmon quinoa bowl: 661 kcal, 46 g protein, 44 g carbs, 35 g fat, with ingredients listed.

04 Side effects & sites

The not-so-fun stuff, tracked.

Log nausea, fatigue, reflux and friends in seconds, along with how strong they felt. A body map remembers where each shot went and suggests where to go next, so rotating sites takes zero brainpower.

PenPal side effect log with nausea and fatigue selected at mild intensity.

05 Progress & reports

Watch the wins add up.

Weight trends, milestones and a timeline of your journey keep every win in view, on the scale and off it. Before a check-in, export a PDF report for your doctor with exactly the data you choose.

PenPal progress screen showing a steady weight drop from 216 lb to 196 lb, 48.78% of the way to goal.

Progress you can feel

Say you’ve lost 20 lb…

PenPal logs your weight, draws the trend and marks the milestones with badges named after real things. Scroll to play the journey, then drag the ruler to try any number.

20lb Every milestone, passed. From Bottle Drop to The Carry-On Era.

4 lb a 2-liter bottle App badge at about this weight: Bottle Drop
9 lb a house cat App badge at about this weight: Cat-Light
11 lb a watermelon App badge at about this weight: Watermelon Drop
13 lb a bowling ball App badge at about this weight: Bowling Ball
15 lb a carry-on suitcase App badge at about this weight: The Carry-On Era

Rewards

A badge for every little win.

Firsts, streaks and milestones, from your very first shot to a million steps. There’s always one more to unlock, and your pal notices every one.

Everything else it does

The little things, handled.

Syncs with Apple Health

Steps, workouts, active energy and weight flow in on their own, so there’s less to type and more to celebrate.

Steps
Workouts
Weight

PenPal activity cards showing 196 lb current weight, 223 calories burned, 6,420 steps and a 35-minute workout.

AI meal logging, with a score

Snap a photo or describe your plate. PenPal estimates protein, fiber and macros, scores the meal and tells you what’s working.

PenPal meal feedback with an Excellent nutrition score of 92 and awards like Protein Powerhouse and Fiber Rich.

Dose reminders

A heads-up a few hours before each dose, for every medication you track, so shot day never sneaks up on you.

Speaks 29 languages

From English and Spanish to Japanese and Turkish, PenPal feels at home in yours.

A doctor-ready PDF report

Pick the dates and what to include (doses, weight, side effects, nutrition, water, activity) and PenPal builds a clean PDF you can share, only if you want to.

PenPal progress report settings with doses, water, activity, weight, side effects and nutrition included.

Your data stays yours

Your health data is never sold or used for ads. Apple Health data stays on your iPhone, and you can delete your account any time.

FAQ

Questions, answered.

Still wondering about something? Send us a note and we’ll get back to you.

Does PenPal work with Ozempic, Wegovy, Mounjaro or Zepbound?

Yes. PenPal works with semaglutide (Ozempic®, Wegovy®, Rybelsus®), tirzepatide (Mounjaro®, Zepbound®) and liraglutide (Saxenda®). Pick your medication, dose and schedule, and PenPal keeps your shot log, reminders and estimated medication level together.

Can I track compounded semaglutide or tirzepatide?

Yes. Choose compounded semaglutide or tirzepatide, enter your vial’s concentration once, and log each dose in mg, mcg or units, the way your pharmacy labels it. PenPal does the math and keeps your history in one place.

How is the medication level estimated?

PenPal combines the doses and times you log with published absorption and half-life values for your medication to draw an estimated level curve. It’s a visual guide for spotting patterns, like when food noise tends to come back. It isn’t a lab measurement, and it’s never a reason to change your dose.

Is PenPal medical advice?

No. PenPal is a tracking companion, not medical advice. It doesn’t diagnose, prescribe or adjust doses. Follow your prescription and care plan, and talk to your clinician about treatment questions or any symptoms that worry you.

Is PenPal free?

PenPal is free to download from the App Store. It also offers an in-app subscription, and Apple shows you the price and any free-trial offer for your region before you confirm anything.

Does PenPal sync with Apple Health?

Yes, if you turn it on. PenPal can bring in steps, workouts, active energy, weight and water from Apple Health, so there’s less to type. Your Apple Health data stays on your iPhone and isn’t uploaded to PenPal’s servers.

Can I share my progress with my doctor?

Yes. Create a PDF progress report for the dates you choose, with your doses, weight, side effects, nutrition, water and activity. You decide whether to share it, and with whom.

Is my health data private?

Yes. We never sell your health data or use it for advertising. Apple Health data stays on your device, and you can delete your account from inside the app whenever you like.

What languages does PenPal speak?

29 of them, including English, Spanish, French, German, Italian, Portuguese, Japanese, Korean, Chinese and Turkish. PenPal follows the language you use on your iPhone.

Learn before you log