Comparison

Stackr vs PepLog

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

Head to head
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. • Unit converter 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

About

PepLog

This app helps users manage peptide protocols by providing a private, on-device logbook. Quickly record doses, track vial usage, monitor consistency with streaks and history, and log weight over time. It also includes a unit converter for precise measurements.

Highlights
  • Log doses in seconds
  • Track vial contents and remaining amounts
  • Monitor logging consistency and history
  • Chart weight over time with goals
  • Unit converter for syringe measurements
  • Private, on-device data storage
Features
Read full description

PepLog is a medication reminder & logbook for people who manage a peptide protocol and want to keep track of their progress & history. It's built around one idea: recording a dose should take seconds, right when it happens, the way a food tracker works. WHAT YOU CAN DO • Log a dose in a couple of taps: amount, time, injection site, and a note • Track your vials: see how much you have left as you log, when each vial was mixed, and how long ago. Finished vials remain in your history • Track meals and macros in beta: scan food barcodes, log meals, and keep an eye on your daily totals • Revisit your eating history: tap a day to review, add, or edit meals. Recently scanned foods make repeat entries easier without adding calories until you log them • Progress photos: capture on a repeatable angle, compare any two side by side, and watch your timeline build over months • See what you've invested: record what a vial cost and PepLog shows your spend, your cost per logged dose, and how much of what you mixed you've used • Set reminders on your own schedule, with multiple times a day, and log or snooze straight from the notification • See your consistency: dose-logging streaks, badges, a week view, and a history of everything you've recorded, plus a separate meal streak • Track your weight and hydration over time, with your own optional goals • Make PepLog yours: choose English or Spanish and switch between light and dark mode in Settings NEW IN 1.5.0 • Spanish is here! Share PepLog with Spanish-speaking friends and family • Macro tracking in beta, including barcode scanning, recently scanned foods, meal history, and daily meal celebrations • Optional referral codes during onboarding to support the person who introduced you to PepLog • Improved sign-in and checkout recovery, with protection against repeated checkout taps • Appearance controls are now in Settings • The standalone in-app measurement calculator has been removed PEPLOG PRO PepLog is a subscription app. Choose a yearly plan with a 3-day free trial for eligible subscribers, or a monthly plan with no trial. Prices are always shown in the app before any purchase, payment is handled by Apple, and you can cancel anytime in your App Store settings. Installed before version 1.2? Your access stays as it was. PepLog is a personal record-keeping tool. It does not provide medical advice, dosing recommendations, or treatment guidance, and it does not recommend or endorse any substance. Always consult a qualified healthcare provider before starting, stopping, or changing any regimen. For adults 18+. Questions or feedback? Contact support@trypeplog.com. Privacy Policy: https://www.trypeplog.com/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Stackr4 screens
PepLog4 screens

Verdict

The call

Stackr and PepLog both sit at 4.4 stars, but that hides the real split: 100% of PepLog's written reviews are positive against 69% of Stackr's. PepLog also leads on monetization model (free vs freemium). Stackr's advantage is ratings volume (232 vs 26) and update cadence (weekly vs fortnightly). On price, rating, ads and in-app purchases 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 7 in-app purchases, starting at $7.99 per 7 days and PepLog sells 2 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 — 4.4 for Stackr against 4.4 for PepLog. That said, the two scores are not equally well evidenced: Stackr has 232 ratings behind it against 26, so its average is the more settled of the two. Written reviews are what separate them: 69% of Stackr's written reviews are positive against 100% of PepLog's.

UpkeepUpdate frequency

Stackr ships an update weekly, PepLog fortnightly. The most recent releases landed on November 13, 2026 and November 10, 2026 respectively.

Scorecard4 real differences · 6 level
Stackr versus PepLog: the parameters behind the verdict, then further details
ParameterStackrPepLog
PriceFreeFree
Rating4.4 (232 ratings) — better4.4 (26 ratings)
Positive reviews69.4% of reviews100.0% of reviews — better
Number of ratings232 — better26
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size86 MB34 MB
Age rating12+17+
DeveloperStackr Holdings LLCMoises Olivares

Customer experience

Stackr

All ratings232 ratings
Positive86.6%
Neutral0.9%
Negative12.5%
Written reviews36 reviews
Positive69.4%
Neutral2.8%
Negative27.8%

PepLog

All ratings25 ratings
Positive84.0%
Neutral0.0%
Negative16.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

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
2 purchases

PepLog

Subscriptions2
  • PepLog Pro Monthly$9.991 Month
  • PepLog Pro Yearly3 Days trial$29.991 Year

Questions

Is Stackr free?
Stackr is free to download, with in-app purchases available.
Is PepLog free?
PepLog is free to download, with in-app purchases available.
Which has better reviews, Stackr or PepLog?
Stackr is rated higher. Stackr averages 4.4 out of 5 from 232 ratings, while PepLog averages 4.4 from 26 ratings.
Do Stackr or PepLog have ads?
Neither Stackr nor PepLog shows ads.
Which is updated more often, Stackr or PepLog?
Stackr ships an update weekly, and PepLog fortnightly. Most recently, Stackr was updated on November 13, 2026 and PepLog on November 10, 2026.

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