Comparison

Stackr vs Peppy

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

Head to head
About

Stackr

Easily track supplements, peptides, and medications to ensure you never miss a dose or run out. Features include a compound library, reconstitution calculator, depletion tracking, and budget management.

Highlights
  • 200+ compound library
  • Reconstitution calculator
  • Depletion tracking
  • Protocol grouping
  • Budget tracking
  • Dose logging
Features
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Track your peptides, GLP-1s, and supplements without a spreadsheet. Start free — no account, no ads, no tracking. Stackr tells you exactly when to reorder, factoring in shipping time, so you never run out mid-protocol. FREE TO START Track up to 3 items free. No account required. Your data stays on your device. NEVER RUN OUT • Depletion tracking with color-coded urgency — see days remaining at a glance • Reorder alerts that factor in your vendor's shipping time • Restock history and reorder logging NEVER OVERPAY • Cost per dose, daily spend, and annual run-rate • Track what each vendor actually costs you RECONSTITUTION CALCULATOR • Vial size + BAC water + target dose → exact syringe markings • U100, U40, and standard mL syringes • Pre-mixed vials too (TRT, HCG) — enter mg/mL and go • Saves your calculations to the item PROTOCOLS THAT MATCH REAL LIFE • Injection-day scheduling and multi-compound protocols • Titration schedules — ramp your dose week by week • Cycling support with on/off day tracking • Injection site rotation LOG IT IN SECONDS • One-tap dose logging with automatic inventory decrement • 100+ compound library with autocomplete • Energy, mood, sleep, and recovery check-ins • Export everything to CSV PRIVATE BY DEFAULT Everything is stored on your device. No account needed. We don't sell your data, show ads, or track you across other apps. Optional cloud backup uses your email only — protected by row-level security so only you can read your own data. STACKR PRO Unlimited items, cloud sync across devices, titration schedules, cycling, custom alert thresholds, full restock history, vendor links, and CSV export. • Monthly: $4.99/month • Annual: $39.99/year (includes 3-day free trial) Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel your subscription in your Apple ID account settings. Stackr is a personal tracking tool and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement, medication, or protocol. Terms of Use: https://www.mystackrapp.com/terms Privacy Policy: https://www.mystackrapp.com/privacy

About

Peppy

This app helps users manage their GLP-1 and peptide injections. It allows for dose tracking, unit conversion, vial organization, injection site rotation, and timely reminders. It also tracks weight and symptoms to visualize progress.

Highlights
  • Dose logging and history
  • MG to syringe unit conversion
  • Vial and stash organization
  • Injection site rotation map
  • Flexible dose reminders
  • Weight and symptom tracking
  • Local data storage
Features
Read full description

Peppy is the peptide tracker that does the math. Log every GLP-1 and peptide dose, convert your prescribed mg into exact syringe units, organize your vials, rotate injection sites, and get gentle reminders so you never miss a shot. No account. No sign-up. Free to start. Peppy is a peptide tracker, logbook, and unit converter. It is not a medical device and it never recommends a dose. You enter the dose you and your provider already decided on; Peppy records it, converts the units, and keeps you organized and consistent. WHY YOU'LL LOVE PEPPY • No account, no sign-up. Open the app and start tracking in seconds • Your health data stays on your device and in your own private iCloud. Never on our servers • Built for GLP-1 and metabolic peptides, branded or compounded, plus custom peptides you add yourself • A peptide tracker with a clean, uncluttered design and a friendly mascot to keep things light • Thoughtful safety reminders at every step TRACK YOUR DOSES A peptide tracker is only as good as its log. Record every injection and see your full history at a glance: what you took, when, and what's next. Back-date a dose you forgot, spot missed doses, and build a streak week after week. CONVERT MG TO SYRINGE UNITS Enter your vial strength, BAC water volume, and prescribed dose. Peppy shows the exact units to draw on a U-100 insulin syringe, with a visual syringe fill to double-check at a glance. The formula is always shown so you can verify the math yourself, and built-in guardrails flag common mix-ups like mg versus mcg. ORGANIZE YOUR STASH AND VIALS Keep every peptide in one stash, track how much is left in each vial, and watch reconstitution and expiry dates so nothing goes to waste. Set up a new vial from presets in a couple of taps, and get a nudge when it's time to refill. ROTATE INJECTION SITES An interactive body map records where you injected and suggests your next site, so you rotate properly and never overuse one spot. NEVER MISS A DOSE Daily or weekly reminders that fit your routine and adapt as your schedule shifts. Titration-aware, so reminders keep pace as your plan steps up. Home Screen and Lock Screen widgets show your next dose and vial levels without opening the app. TRACK YOUR PROGRESS Log weight and symptoms alongside your doses and see clear trends in simple charts, so you and your provider can see how the plan is going. One peptide tracker for the whole picture. SAFETY FIRST Clear disclaimers appear throughout the app, every conversion reminds you to follow your provider's instructions, and the method is always visible so you can verify it. Peppy never recommends a dose, never sources or sells peptides, and never offers medical advice. Always follow the guidance of your licensed healthcare provider. PRIVATE BY DESIGN Your doses, weight, symptoms, and notes are stored on your device and, if you choose, synced through your own iCloud account. They are never uploaded to our servers, and there is no account to create. We collect anonymous, non-health usage analytics only if you opt in, and an advertising-measurement tool runs only if you allow tracking. See our Privacy Policy for full details. SUBSCRIPTION Peppy offers a subscription with a free trial. Plan options, durations, and prices are shown in the app and may vary by region. Payment is charged to your Apple ID at confirmation of purchase. Your subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID settings. Terms of Use: https://mypeppy.io/terms-of-service Privacy Policy: https://mypeppy.io/privacy-policy Peppy is not affiliated with, endorsed by, or sponsored by any pharmaceutical manufacturer. All product names are trademarks of their respective owners and are used for identification only. Whether you are on a GLP-1 or building a peptide stack, Peppy is the peptide tracker that keeps you organized, consistent, and informed. Download Peppy today.

Screenshots

Stackr4 screens
Peppy4 screens

Verdict

The call

The clearest difference is ads: Stackr at none against Peppy's shown. Stackr also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). Peppy's advantage is ratings volume (69 vs 9). On price, rating, review sentiment and update cadence 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. Stackr sells 2 in-app purchases, starting at $4.99 per month and Peppy sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Stackr against 4.9 for Peppy. That said, the two scores are not equally well evidenced: Peppy has 69 ratings behind it against 9, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Stackr ships an update every 4 days, Peppy every 5 days. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

Scorecard4 real differences · 6 level
Stackr versus Peppy: the parameters behind the verdict, then further details
ParameterStackrPeppy
PriceFreeFree
Rating5.0 (9 ratings) — better4.9 (69 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings969 — better
Update frequencyEvery 4 days — betterEvery 5 days
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size53 MB57 MB
Age rating12+17+
DeveloperAlexander HooglandAutomation Launchpad

Customer experience

Stackr

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Peppy

All ratings69 ratings
Positive98.6%
Neutral0.0%
Negative1.4%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Stackr

Subscriptions2
  • Stackr Pro Monthly3 Days trial$4.991 Month
  • Stackr Pro Annual3 Days trial$39.991 Year
3 purchases

Peppy

Subscriptions2
  • Peppy Premium Monthly$9.991 Month
  • Peppy Premium Yearly3 Days trial$49.991 Year
One-time1
  • Peppy Premium Lifetime$79.99

Questions

Is Stackr free?
Stackr is free to download, with in-app purchases available.
Is Peppy free?
Peppy is free to download, with in-app purchases available.
Which has better reviews, Stackr or Peppy?
Stackr is rated higher. Stackr averages 5.0 out of 5 from 9 ratings, while Peppy averages 4.9 from 69 ratings.
Do Stackr or Peppy have ads?
Peppy shows ads; Stackr does not.
Which is updated more often, Stackr or Peppy?
Stackr ships an update every 4 days, and Peppy every 5 days. Most recently, Stackr was updated on October 17, 2026 and Peppy on October 18, 2026.

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