GLP-1 tracker for Ozempic, Wegovy,Mounjaro, Zepbound & more.↓
What’s yourpen day?
On a weekly GLP-1, one dayanchors your week. Make it yours.
Shot day, jab day, injection day.MondayTuesdayWednesdayThursdayFridaySaturdaySunday
Estimated level · Mounjaro/Zepbound example
Point your phone camera here.Scan for your pen-dayMondayTuesdayWednesdayThursdayFridaySaturdaySunday reminder
Backed by
Weight loss is two numbers, not one.
Free · Example app data: current weight 91.0 kg, down 8.0 kg since the start. Plus · Example app data, scans 9 weeks apart: Your scans split the change into fat and muscle. Fat 27.1 kg, down 5.0 kg; muscle 33.2 kg, down 2.3 kg.
Scan your body in 3D.
Plus · Example app data. Take a 3D body scan and measure muscle loss, not just weight. Your body scan stays on your phone.
Your first body scan is free.
$59.99 a year$59.99a year
7 days free on the annual plan,or $19.99 a month. US prices.
Free. Every pen, and the week after it. A woman sits at her table, her pen in her hand. Estimated level · Mounjaro/Zepbound (tirzepatide) example. Estimated relative level that illustrates published half-lives. It is not a measurement or medical advice.
Dose vs. side effects.
Free · Example app data · a Wednesday pen day. Your estimated medication level, with the week’s side effects in lanes under it. Patterns are estimated from what you log, not medical advice.
A woman sits at her desk, her hand to her temple. The estimated level peaks about 20 hours after the Wednesday pen; Dose and Symptoms shows its Peak and six symptom lanes across the week. On day 6, How are you feeling? shows 6 days since the 7.5 mg dose. Tap a face to log symptoms.
Where the next pen goes.
Free · Example app data. Every pen is logged with its site. Pensday recommends a fresh spot for the next one.
A woman reaches for her pen beside her phone. Her body map slides in: nine shots since Jul 15 and, next, the right arm.
Body map: nine shots logged since Jul 15, one a week, rotating: four on the abdomen, four on the thighs, the last on the left arm on Sep 9. Next: the right arm, a fresh spot.
- Jul 15, 2.5 mg: Abdomen · Upper Left
- Jul 22, 2.5 mg: Abdomen · Upper Right
- Jul 29, 2.5 mg: Abdomen · Lower Left
- Aug 5, 2.5 mg: Abdomen · Lower Right
- Aug 12, 5 mg: Left Thigh · Upper
- Aug 19, 5 mg: Right Thigh · Upper
- Aug 26, 5 mg: Left Thigh · Lower
- Sep 2, 5 mg: Right Thigh · Lower
- Sep 9, 7.5 mg: Left Arm
- Next · Right Arm: Fresh spot — never used
9 shots placed · 2 months of rotation.
The phone: Log a shot, Mounjaro 7.5 mg, injection site Right Arm.
Snap a meal andPensday logs it,protein included.Snap a meal andPensday logs it,protein included.
Your first 7 AI food scans are free.Your first 7 AI food scans are free.Plus gives you unlimited AI food scans.
Compare Free and Plus ↓Plus. In a café, under a lamp, a woman holds up her phone over her dinner. The app's camera frames the plate and reads it.
Protein, calories, water and fiber.
Free · Example app data. Keep meals and protein together. Barcode and food search are free.
The phone: Dinner, 65 g protein, Steak & sweet potato; Lunch, 29 g, Lentil soup; Breakfast, 29 g, Greek yogurt & berries; Log Food: Scan, Search, Voice; Hydration 7 of 8. Nutrition goals: Protein 123 of 120 g, Calories 1,668 of 2,105, Water 1.8 of 2.0 L, Fiber 32 of 30 g.
Never miss a scoop or a pill.
Free · iPhone for now · Example app data. Log protein shakes, creatine and fiber, and see them count toward your daily protein. On a sunlit terrace above the sea, a woman scoops protein powder into a shaker at a marble table, next to a glass of water, two pill bottles, a few loose pills and a pill organizer. Then the app's Supplements screen with today's protein and fiber and the morning stack.
Short workouts that keep your muscle.
Free · iPhone for now · Example app data. Short strength sessions and a 28-day plan built for people on a GLP-1, with a coach voice to guide you. After her workout on a terrace above the sea, a woman sits on a white bench and drinks her shake, next to a dumbbell, a red towel, a glass of water, a jar and her pills. Then the same terrace, one move at a time: a squat, a glute bridge, a dumbbell lunge, high knees, a side stretch, a plank and a kettlebell squat. Then the app's strength plan: Your 28 days. Today, Day 12: Dumbbell Full Body, 16 minutes, strength; days 8 to 11 done this week.
Know when your dose steps up.
See your dose steps before each one arrives. Example app data: 2.5 mg, started Jul 15; 5 mg, started Aug 12; 7.5 mg from Sep 9, you are here. An illustration of a woman running up ivory steps toward a flag and a red sun; her three doses are marked on the steps under her. Then the app's Titration screen: step 3 of 3, currently 7.5 mg, weeks 9–12, since Sep 9.
See what each dose did: the Weight report. Every dose’s change adds up to today’s weigh-in.
Never miss a shot.
Free · Example app data · a Wednesday pen day. Next-shot countdown and dose reminders with their own sound. On her wall calendar, two Wednesdays are checked in red; the next one is circled. The Dose and Schedule screen: reminder time 8:30 AM, weekly on Wednesday; next dose in 18 hours, Wed, Sep 16 · 8:30 AM.
Set it once in Pensdayand a reminder comeson your pen day,every Monday.every Tuesday.every Wednesday.every Thursday.every Friday.every Saturday.every Sunday.every week.Set it once inPensday and areminder comeson your pen day,every Monday.every Tuesday.every Wednesday.every Thursday.every Friday.every Saturday.every Sunday.every week.
Point your phone camera here.Scan for your pen-dayMondayTuesdayWednesdayThursdayFridaySaturdaySunday reminder
GLP-1 tracker for Ozempic, Wegovy,Mounjaro, Zepbound & more.↓
What’s yourpen day?
On a weekly GLP-1, one dayanchors your week. Make it yours.
Shot day, jab day, injection day.MondayTuesdayWednesdayThursdayFridaySaturdaySunday
Estimated level · Mounjaro/Zepbound examplePoint your phone camera here.Scan for your pen-dayMondayTuesdayWednesdayThursdayFridaySaturdaySunday reminder
Backed by
Weight loss is two numbers, not one.
Your scans split the change into fat and muscle.
Scan your body in 3D.
Take a 3D body scan and measure muscle loss, not just weight.
Your body scan stays on your phone.
Your first body scan is free.
$59.99 a year
7 days free on the annual plan, or $19.99 a month. US prices.
Compare Free and Plus ↓Every pen, and the week after it.
Estimated level · Mounjaro/Zepbound (tirzepatide) example
Estimated relative level that illustrates published half-lives. It is not a measurement or medical advice.
Dose vs. side effects.
Your estimated medication level, with the week’s side effects in lanes under it.
Patterns are estimated from what you log, not medical advice.
Tap a face to log symptoms.
Where the next pen goes.
Every pen is logged with its site.
Pensday recommends a fresh spot for the next one.
- Next · Right ArmFresh spot — never used
9 shots placed · 2 months of rotation
Snap a meal and Pensday logs it, protein included.
Your first 7 AI food scans are free. Plus gives you unlimited AI food scans.
Compare Free and Plus ↓ Free · Example app dataProtein, calories, water and fiber.
Keep meals and protein together.
Barcode and food search are free.
Never miss a scoop or a pill.
Log protein shakes, creatine and fiber, and see them count toward your daily protein.
Short workouts that keep your muscle.
Short strength sessions and a 28-day plan built for people on a GLP-1, with a coach voice to guide you.
Know when your dose steps up.
See your dose steps before each one arrives.
See what each dose did.
Every dose’s change adds up to today’s weigh-in.
Never miss a shot.
Next-shot countdown and dose reminders with their own sound.
Set it once in Pensday and a reminder comes on your pen day,every Monday.every Tuesday.every Wednesday.every Thursday.every Friday.every Saturday.every Sunday. every week.
Point your phone camera here.Scan for your pen-dayMondayTuesdayWednesdayThursdayFridaySaturdaySunday reminder
Free for every pen. Plus when you want more.
Everything you need to track a pen is free. Plus adds AI food scanning and the 3D body scan.
Every pen
Dose tracking is free.
- Dose tracking
- Reminders
- Estimated medication level
- Injection-site rotation
- Symptoms
- Weight
- Dose steps
- Barcode, food search and water
- Supplements: protein shakes, creatine and fiber (iPhone for now)
- Strength workouts and a 28-day plan (iPhone for now)
- Progress photos, kept on your phone
- Apple Health, both ways
- Share with your clinic, only if you want
- Export or delete everything, any time
$59.99 a year
7 days free on the annual plan, for eligible subscribers, or $19.99 a month.
First body scan and first 7 AI food scans are free.
Everything in Free, and:
Choose your plan in the app. US prices. See the App Store or Google Play for local prices and subscription terms.
Free on iPhone and Android
Your medicine. Your routine.
Works with every GLP-1. Twelve medicines by name: pens, vials and pills, compounded included. Pick yours once, and every pen you log carries its name and dose.
- Ozempicpen
- Wegovypen
- Wegovy pillpill
- Mounjaropen
- Zepboundpen or vial
- Rybelsuspill
- Trulicitypen
- Saxendapen
- Victozapen
- Compounded semaglutidevial
- Compounded tirzepatidevial
- Retatrutidelog only
Pensday is not affiliated with Novo Nordisk or Eli Lilly. Ozempic, Wegovy, Rybelsus, Saxenda and Victoza are trademarks of Novo Nordisk A/S. Mounjaro, Zepbound and Trulicity are trademarks of Eli Lilly and Company.
Questions
Why Pensday?
The name is the day you take your pen. Pick it once and the app plans the week around it: the reminder, the level, the patterns.
Is this the app that used to be Tiro?
Yes. Pensday is its new name: the same app and App Store listing.
What does Pensday track?
Every dose and injection site, your estimated medication level, side effects and weight, with a reminder on your pen day. Pensday Plus adds AI food scanning and the 3D body scan.
Which medicines does it work with?
Twelve, each by name: Ozempic, Wegovy (pen and pill), Mounjaro, Zepbound, Rybelsus, Trulicity, Saxenda, Victoza, compounded semaglutide, compounded tirzepatide, and retatrutide (log only).
What is free, and what does Plus cost?
Dose tracking, reminders, the estimated medication level, injection-site rotation, symptoms and weight are free. Your first body scan and your first 7 AI food scans are free too. Pensday Plus adds AI food scanning and the 3D body scan for $59.99/year or $19.99/month (US). The annual plan includes a 7-day trial for eligible subscribers; the monthly plan has no trial. See the App Store for local prices and terms.
Are my body-scan photos private?
Yes. Normal body-scan processing happens on your phone. Optional research submissions require consent. Food recognition uses remote processing.
Does Pensday give medical advice?
No. Pensday is a tracking app. Your medication level and patterns are estimated from what you log, not measured: share them with your clinician, and talk to your prescriber about your dose.
Which devices does it run on?
iPhone and Android. Download Pensday on the App Store or Google Play. Pensday on the App Store · Pensday on Google Play
Backed by
Pre-Acceleration Program · Batch 4