Comparison

Stackr vs Peptide Injection Tracker

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. • 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

About

Peptide Injection Tracker

Log peptide injections privately on your device. Features include site rotation, reminders, and PDF export. Access a peptide library, concentration helper, and amino acid guide with quizzes.

Highlights
  • On-device logging
  • Visual body map for site rotation
  • Daily injection reminders
  • PDF history export
  • Peptide library reference
  • Concentration helper
  • Amino acid guide and quiz
Features
Read full description

Peptide Injection Tracker is a focused, private way to organize the records you choose to keep—without creating an account, seeing ads, or sharing a health profile. LOG IN SECONDS Save a timestamp and, if you choose, the amount, unit, route, site, and notes from your own record. Review details before confirming, then edit or delete entries anytime. SEE YOUR ROUTINE Keep your own reminder schedule beside completed entries in one calendar. The app ships with no preset regimen and never recommends a schedule. REVIEW SITE HISTORY See when each site last appeared in your records. Colors communicate elapsed time only and do not recommend a location. CORE TRACKING Track one peptide, keep your basic log and calendar, set a reminder, use site history, and use Quick Math. OPTIONAL PRO Upgrade to Annual Pro or Lifetime Pro for unlimited peptides, active-vial inventory, private insights, and PDF, CSV, and full-data exports. PRIVATE BY DESIGN - Stored on your iPhone - No account - No ads - No analytics or tracking - Optional Face ID app lock Peptide Injection Tracker is a personal recordkeeping and educational-reference utility. It is not medical advice or a medical device and does not diagnose, prescribe, recommend, source, verify, or calculate an amount to administer. Consult a licensed healthcare professional before making medical decisions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Stackr4 screens
Peptide Injection Tracker4 screens

Verdict

The call

Stackr and Peptide Injection Tracker both sit at 4.4 stars, but that hides the real split: 100% of Peptide Injection Tracker's written reviews are positive against 68% of Stackr's. Stackr's advantage is ratings volume (225 vs 3) and update cadence (weekly vs every 3 weeks). 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 Peptide Injection Tracker sells 2 in-app purchases, starting at $9.99 per year. 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 4.3 for Peptide Injection Tracker. That said, the two scores are not equally well evidenced: Stackr has 225 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 68% of Stackr's written reviews are positive against 100% of Peptide Injection Tracker's.

UpkeepUpdate frequency

Stackr ships an update weekly, Peptide Injection Tracker every 3 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 7 level
Stackr versus Peptide Injection Tracker: the parameters behind the verdict, then further details
ParameterStackrPeptide Injection Tracker
PriceFreeFree
Rating4.4 (225 ratings) — better4.3 (3 ratings)
Positive reviews67.6% of reviews100.0% of reviews — better
Number of ratings225 — better3
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
Best chart rank#187 — better—
DevicesiPhoneiPhone
Requires iOS17.016.4 — better
Further details — not scored
Size88 MB28 MB
Age rating12+17+
DeveloperStackr Holdings LLCJuan Ballon

Customer experience

Stackr

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

Peptide Injection Tracker

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews2 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

Peptide Injection Tracker

Subscriptions1
  • Pro Annual$9.991 Year
One-time1
  • Lifetime Pro$19.99

Questions

Is Stackr free?
Stackr is free to download, with in-app purchases available.
Is Peptide Injection Tracker free?
Peptide Injection Tracker is free to download, with in-app purchases available.
Which has better reviews, Stackr or Peptide Injection Tracker?
Stackr is rated higher. Stackr averages 4.4 out of 5 from 225 ratings, while Peptide Injection Tracker averages 4.3 from 3 ratings.
Do Stackr or Peptide Injection Tracker have ads?
Neither Stackr nor Peptide Injection Tracker shows ads.
Which is updated more often, Stackr or Peptide Injection Tracker?
Stackr ships an update weekly, and Peptide Injection Tracker every 3 weeks. Most recently, Stackr was updated on November 9, 2026 and Peptide Injection Tracker on October 31, 2026.

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