Comparison

COMPOUND vs Stacksy

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

Head to head
About

COMPOUND

This app provides advanced tracking and analysis for peptide and TRT protocols. It uses AI to analyze interactions, correlate side effects with dosing, and scan bloodwork results. Manage complex stacks with smart reconstitution, a comprehensive database, and interactive pharmacokinetics.

Highlights
  • AI Stack Analyzer for interaction warnings
  • Side-Effect Correlation Engine
  • Bloodwork OCR Scanner
  • Smart Reconstitution calculations
  • 42-Compound Database with research links
  • Protocol AI Chat for personalized advice
  • Interactive Stack Pharmacokinetics visualization
Features
Read full description

Most peptide apps are reminders with a calculator stapled on. You're running BPC-157, CJC-1295, Ipamorelin, maybe retatrutide, maybe TRT alongside it. Real vials, real money. And the best record of it is a Notes app you forgot to update or a spreadsheet that lost your reconstitution dates. COMPOUND is the protocol intelligence layer for serious operators. Built on published pharmacology and cited research. Not a timer. Not a generic medication app. The instrument your protocol deserves. STACK ANALYSIS* Enter your full protocol: BPC-157, TB-500, CJC-1295, Ipamorelin, GHK-Cu, tesamorelin, retatrutide, semaglutide, tirzepatide, testosterone. COMPOUND's AI-assisted analysis flags interaction patterns, timing overlaps, redundant pathways, and absorption issues, each one cited to peer-reviewed research. Two compounds hitting the same pathway is a wasted vial; you will see it. It reports what it finds. It does not write your protocol. SIDE-EFFECT CORRELATION* Log quick daily check-ins. COMPOUND maps every symptom against your dose timeline and surfaces the patterns you would not find by hand. Insomnia lining up with evening CJC. Nausea tracking a titration step. Mood dips that follow estradiol troughs. BLOODWORK SCANNER* Photograph or import any lab report. COMPOUND extracts every marker (free T, total T, estradiol, IGF-1, CRP, AST/ALT, A1C, lipids, hematocrit) and plots them on your protocol timeline. Told you're "in range" while the symptoms stay? Bring the trend to your next appointment, not the single number. RECONSTITUTION CALCULATOR Stepped input or plain language*: "10mg vial, 250mcg twice daily." Exact syringe units, vial duration, expiry tracking. Unit conversion for the amount you choose; it does not pick your dose. No mental math at 6am. STACK PHARMACOKINETICS* Your whole protocol on one estimated serum concentration curve, built from published half-lives and your own log. Drag a dose time and watch coverage shift across the day. Cycle calendar, cross-cycle comparison, restart readiness check. 90+ COMPOUND REFERENCE LIBRARY Half-life, mechanism of action, regulatory status, protocol patterns reported in the literature, known interactions, and the key studies with PubMed links. 250+ cited studies. Written for people who read the papers. PROTOCOL CHAT* Ask anything about your own stack. Every answer is grounded in your protocol, your symptom log, your bloodwork, and cited research, not a generic chatbot that does not know what you are running. It shows you the evidence; it does not prescribe. ALSO INCLUDED - Dose logging with injection site rotation and timing analysis - Vial inventory and supply alerts* - Symptom journal with pattern detection - Unlimited protocols, reminders, home screen widget - Apple Health sync: sleep, HRV, resting heart rate, workouts, weight, glucose WHO COMPOUND IS FOR - People running multi-compound peptide protocols - TRT users tired of a single number standing in for how they feel - Reta and tirzepatide users who want more than a shot tracker - Anyone who refuses to guess with vials that cost real money - Researchers who already built the spreadsheet and want it on their phone, smarter PRIVACY Anonymous sign-in. No ad-tech. No tracking SDKs. No data resale. IMPORTANT COMPOUND is not a medical device. It does not diagnose, treat, or prevent any condition, and it does not prescribe, recommend, or adjust doses. All analysis is informational, based on published pharmacological research. Always consult a qualified healthcare provider before starting or modifying any protocol or medication. * Requires COMPOUND PRO subscription. Free to start. Privacy Policy: https://usecompound.app/privacy Terms (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stacksy

Organize and track your personal peptide protocol with this private application. Manage your entire routine, including what peptides to take and when. Offers monthly and yearly subscription plans for full access.

Highlights
  • Organize peptide protocols
  • Track peptide dosages
  • Schedule peptide intake
  • Private routine management
  • GLP-1 tracking
Features
Read full description

Stacksy is a simple, private way to organize and track your personal peptide protocol. Your whole routine in one place: what you're taking and when to take it. Stacksy requires a Premium auto-renewable subscription to use the app: - Stacksy Premium (Monthly): $9.99 / month - Stacksy Premium (Yearly): $39.99 / year Payment is charged to your Apple ID at purchase confirmation. Your subscription auto-renews unless cancelled at least 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. Privacy Policy: https://stacksy.netlify.app/privacy Terms of Use (EULA): https://stacksy.netlify.app/terms

Screenshots

COMPOUND4 screens
Stacksy4 screens

Verdict

The call

The clearest difference is monetization model: COMPOUND at free with in-app purchases against Stacksy's subscription. Stacksy's advantage is update cadence (every 2 days vs every 9 days) and ratings volume (16 vs 3). 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. COMPOUND sells 5 in-app purchases, starting at $6.99 per 7 days and Stacksy 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 — 5.0 for COMPOUND against 5.0 for Stacksy. That said, the two scores are not equally well evidenced: Stacksy has 16 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

COMPOUND ships an update every 9 days, Stacksy every 2 days. The most recent releases landed on September 29, 2026 and September 18, 2026 respectively.

Scorecard4 real differences · 6 level
COMPOUND versus Stacksy: the parameters behind the verdict, then further details
ParameterCOMPOUNDStacksy
PriceFreeFree
Rating5.0 (3 ratings)5.0 (16 ratings)
Positive reviews—100.0% of reviews
Number of ratings316 — better
Update frequencyEvery 9 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhoneiPhone, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size52 MB65 MB
Age rating12+17+
DeveloperTorben Nils SeidlerVelor4 LLC

Customer experience

COMPOUND

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Stacksy

All ratings16 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

COMPOUND

Subscriptions5
  • Compound Pro · Weekly$6.997 Days
  • Compound Pro · Quarterly3 Days trial$24.993 Months
  • Compound Pro · Yearly DISCOUNTED$34.991 Year
Show 2 more
  • Compound Pro · Yearly7 Days trial$49.991 Year
  • COMPOUND Pro · Yearly$69.991 Year
2 purchases

Stacksy

Subscriptions2
  • Stacksy Pro (Monthly)$9.991 Month
  • Stacksy Pro (Yearly)3 Days trial$39.991 Year

Questions

Is COMPOUND free?
COMPOUND is free to download, with in-app purchases available.
Is Stacksy free?
Stacksy is free to download, with in-app purchases available.
Which has better reviews, COMPOUND or Stacksy?
COMPOUND and Stacksy are both rated 5.0 out of 5 on the App Store, from 3 and 16 ratings respectively.
Do COMPOUND or Stacksy have ads?
Neither COMPOUND nor Stacksy shows ads.
Which is updated more often, COMPOUND or Stacksy?
COMPOUND ships an update every 9 days, and Stacksy every 2 days. Most recently, COMPOUND was updated on September 29, 2026 and Stacksy on September 18, 2026.

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