Comparison

Regimen vs Stackr

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Regimen

Log injections, doses, side effects, and weight for GLP-1, TRT, HRT, and peptide medications. Plan schedules, rotate injection sites, track vials, bloodwork, and nutrition. Syncs with Apple Health and offers a compound library.

Highlights
  • Log injections and doses
  • Track side effects and weight
  • Schedule custom dosing
  • Rotate injection sites
  • Sync with Apple Health
  • Monitor bloodwork and labs
  • Visualize medication levels
Features
Read full description

Regimen is a peptide and GLP-1 tracker app with 30,000+ downloads, built to log injections, doses, side effects and weight, whether you're on GLP-1 weight loss medication, peptides, TRT or HRT. Plan schedules, rotate injection sites, track vials, bloodwork, nutrition and progress photos, and sync Apple Health, with a 200+ compound library. Free for your first compound, with no time limit. A subscription adds more compounds and advanced features, with a 14-day free trial. WHAT YOU CAN TRACK - Peptides (BPC-157, TB-500, GHK-Cu, CJC-1295, Ipamorelin, and more) - GLP-1 medications and pens, brand-name or compounded (Semaglutide, Tirzepatide, Ozempic, Mounjaro, Wegovy, Zepbound) - Testosterone replacement therapy (TRT), with your bloodwork and lab results - Hormone replacement therapy (HRT) - Performance compounds - Oral medications, nasal sprays, and any compound with a dosing schedule - Custom medications CUSTOM SCHEDULING Daily, weekly, twice weekly (every 3.5 days), every X days, specific days (Mon/Wed/Fri), as needed, or on/off cycles with start and stop reminders. Set different doses on different days, or several doses a day, each with its own amount. Get a reminder for every dose. Dose titration lets you plan dose increases in advance, for example 2.5 mg for 4 weeks, then 5 mg, then 10 mg, and Regimen moves every dose to the right day. SEE YOUR PATTERNS Regimen reads your doses, side effects, weight, sleep and labs together and flags the patterns, measured against your own baseline. For example: food noise quieter since your dose went from 2 to 4 mg, or hematocrit trending up since starting testosterone. APPLE HEALTH INTEGRATION Connect Apple Health and automatically sync weight, body fat, lean mass, sleep stages, HRV, resting heart rate, blood pressure, blood glucose, steps, workouts and nutrition, right next to your doses. Overlay any compound against your health data and daily symptoms. Started tirzepatide? Watch your weight respond and compare it to published clinical trial averages. Changed your TRT dose? See how your sleep and energy responded. NUTRITION AND ACTIVITY Keep track of your protein and water with daily goals, plus your steps and workouts, right alongside your doses. SIDE EFFECTS AND DAILY MARKERS Track side effects from your GLP-1 or any other medication, plus 50+ daily markers: energy, mood, sleep quality, libido, cravings, water retention, joint pain, injection-site reactions, and more. WATCH YOUR LABS MOVE Log every bloodwork pull. See testosterone, lipids, glucose and more move with your protocol. INJECTION MANAGEMENT Log where you inject every dose, rotate your sites, and see your full injection history. Each dose card shows your units marked on a syringe, and you can see the planned site for every upcoming dose. VISUALIZE MEDICATION LEVELS See compound levels in your body hour by hour with half-life plotting. Understand when medications are most active. SEE YOUR TRANSFORMATION Weight, body composition and body measurements (waist, hips, chest, arms and more) over time, plus progress photos as before-and-after pairs and weekly grids. NEVER RUN OUT MID-CYCLE Track vials, pens and tablets with low-stock alerts. Import your history by CSV and export your data anytime. YOUR DATA IS PRIVATE Your data is encrypted in transit and at rest, and synced across your devices. We never sell it. You are in full control of your data. IMPORTANT DISCLAIMER Regimen is for tracking and organization only. It does not provide medical advice, recommend doses, or calculate doses or syringe units. Always consult your healthcare provider before starting or changing any protocol. Questions? Email support@helloregimen.com Privacy: https://helloregimen.com/privacy Terms: https://helloregimen.com/terms

About

Stackr

This app simplifies tracking peptide and GLP-1 doses, including supplies like vials and pens. It offers smart reminders, home screen widgets, and visual charts of estimated active levels based on half-life. Designed for users managing peptide protocols, it keeps your dosing information organized and accessible.

Highlights
  • Log peptide and GLP-1 doses
  • Track vials, pens, and other supplies
  • Smart reminders for next doses
  • Home screen widgets
  • Estimated active level charts
  • Multi-peptide stack tracking
  • Reference pages for common compounds
Features
Read full description

Stackr is the all-in-one tracker for your peptide and GLP-1 protocol. Every dose, vial and meal in one place, with the math done for you. KEY FEATURES • Dose tracking and reminders Log a dose in seconds from your Home screen. Run daily, weekly, every-few-days or specific-day schedules, and several protocols at once. Reminders make sure you never miss a dose, and Home Screen widgets show what's next. • Dose calculator Enter your vial strength, water and dose, and see exactly how many units to draw on a U-100 or U-40 syringe. Works in mcg, mg, IU and units. • Supplies and vials Track vials, pens and other supplies. Stackr counts down what's left every time you log and warns you before you run out. • Progress Keep your weight, progress photos and dose history together, with a calendar of taken and missed doses and estimated active levels from your logs. • Food and calories Snap a meal, scan a barcode, search a food or just say what you ate. Stackr tracks calories and protein against your daily plan. • Stackr Coach Ask the AI coach questions about your routine and your meals, any time. • Learn Reference pages for semaglutide, tirzepatide, retatrutide, BPC-157, TB-500, GHK-Cu and 100+ more, with research status and sources. WHY STACKR • Built for GLP-1s and peptides, from one weekly shot to a full stack • Pounds or kilograms, mcg or mg, U-100 or U-40 • Syncs across your devices when you sign in • Message the team directly from Settings Stackr is a personal tracking and educational app. It does not give medical advice, prescribe treatments or tell you which peptide, dose or schedule is right for you. Always talk to a qualified healthcare professional. Active levels and photo-based nutrition values are estimates. SUBSCRIPTION Stackr is free to download. Full access requires a paid Stackr+ subscription. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple Account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getstackr.app/privacy

Screenshots

Regimen4 screens
Stackr4 screens

Verdict

The call

The clearest difference is rating: Regimen at 4.8 against Stackr's 4.4. Regimen also leads on review sentiment (94% vs 68%) and device support (3 vs 1). Stackr's advantage is chart position (#192 vs unranked). On price, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Regimen sells 2 in-app purchases, starting at $7.99 per month and Stackr sells 7 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Regimen holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 574 and 225 respectively. Written reviews point the same way: 94% of Regimen's written reviews are positive against 68% of Stackr's.

UpkeepUpdate frequency

Regimen ships an update every 9 days, Stackr weekly. Both last shipped on November 9, 2026.

Scorecard5 real differences · 6 level
Regimen versus Stackr: the parameters behind the verdict, then further details
ParameterRegimenStackr
PriceFreeFree
Rating4.8 (574 ratings) — better4.4 (225 ratings)
Positive reviews94.2% of reviews — better67.6% of reviews
Number of ratings574 — better225
Update frequencyEvery 9 daysWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
Best chart rank—#192 — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size27 MB88 MB
Age rating12+12+
DeveloperAwaken Labs LLCStackr Holdings LLC

Customer experience

Regimen

All ratings574 ratings
Positive96.3%
Neutral1.0%
Negative2.6%
Written reviews69 reviews
Positive94.2%
Neutral0.0%
Negative5.8%

Stackr

All ratings198 ratings
Positive86.9%
Neutral1.0%
Negative12.1%
Written reviews34 reviews
Positive67.6%
Neutral2.9%
Negative29.4%

In-app purchases

2 purchases

Regimen

Subscriptions2
  • Regimen Premium14 Days trial$7.991 Month
  • Regimen Premium Annual14 Days trial$49.991 Year
7 purchases

Stackr

Subscriptions7
  • Stackr+ Weekly$7.997 Days
  • Monthly$12.991 Month
  • Stackr+ Yearly$29.991 Year
Show 4 more
  • Stackr+ Yearly$49.991 Year
  • Stackr+ Yearly3 Days trial$49.991 Year
  • Stackr+ Yearly$59.991 Year
  • Yearly3 Days trial$69.991 Year

Questions

Is Regimen free?
Regimen is free to download, with in-app purchases available.
Is Stackr free?
Stackr is free to download, with in-app purchases available.
Which has better reviews, Regimen or Stackr?
Regimen is rated higher. Regimen averages 4.8 out of 5 from 574 ratings, while Stackr averages 4.4 from 225 ratings.
Do Regimen or Stackr have ads?
Neither Regimen nor Stackr shows ads.
Which is updated more often, Regimen or Stackr?
Regimen ships an update every 9 days, and Stackr weekly. Most recently, Regimen was updated on November 9, 2026 and Stackr on November 9, 2026.

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