Comparison

PepStack vs Peptide Protocol+

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

Head to head
About

PepStack

Features
Read full description

PepStack is a reconstitution and dosing-math calculator and protocol scheduler for peptide researchers. CALCULATE WITH CONFIDENCE • Exact BAC-water volume, concentration, syringe units, and doses-per-vial • Supports U-100 / U-50 / U-40 / U-30 insulin syringes • Step-by-step reconstitution guide PLAN YOUR PROTOCOL • Build a weekly schedule and sync dose reminders • Log doses, track streaks, rotate injection sites • Reference library of common research peptides STAY ORGANIZED • Vial inventory with expiry and low-stock alerts • Optional Apple Health sync for weight & body-fat trends • Wellness journal and progress insights PepStack is an educational calculator. It is not medical advice and does not sell or supply any substance. Always consult a qualified professional. PepStack Pro is an auto-renewable subscription (monthly or annual). Payment is charged to your Apple ID; it auto-renews unless canceled at least 24 hours before the period ends. Manage or cancel in Settings. Pro unlocks unlimited protocols, dose logging, AI insights, and PDF export. Terms of Use (EULA): https://pepstack.co/terms Privacy Policy: https://pepstack.co/privacy

About

Peptide Protocol+

This app helps researchers manage peptide cycles with detailed protocol building, smart reminders, and progress tracking. It includes a built-in library for quick reference and prioritizes user privacy with local data storage and PIN protection.

Highlights
  • Build peptide cycles with dosage and frequency
  • Smart dose reminders
  • Review cycle history and add notes
  • Built-in peptide library
  • Local data storage and PIN protection
Features
Read full description

Peptide Protocol+ is the simplest peptide app on the market — built for researchers, by researchers. BUILD PROTOCOLS Set up peptide cycles with dosage, titration, frequency, and reconstitution details, all in one place. STAY ON SCHEDULE Smart reminders make sure you never miss a dose. REVIEW PROGRESS Analyze your cycle history, add research notes, and refine your stack over time. LEARN AS YOU GO A built-in peptide library gives you key reference info at a glance. PRIVATE BY DESIGN Your data stays on your device. Lock the app with a PIN, and your research data and PIN are encrypted locally — nothing is shared with third parties. Peptide Protocol+ is designed exclusively for research and educational purposes. Peptides discussed in this app may be research chemicals not approved for human use by the FDA or equivalent regulatory bodies in your country.

Screenshots

PepStack4 screens
Peptide Protocol+4 screens

Verdict

The call

The clearest difference is in-app purchases: Peptide Protocol+ at none against PepStack's 2. Peptide Protocol+ also leads on iOS requirement (15.1 vs 17.0). On price, ads and device support 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. PepStack sells 2 in-app purchases, starting at $4.99 per month. Peptide Protocol+ asks for nothing beyond the download.

Scorecard2 real differences · 7 level
PepStack versus Peptide Protocol+: the parameters behind the verdict, then further details
ParameterPepStackPeptide Protocol+
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequency—Daily
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size9 MB42 MB
Age rating4+4+
DeveloperDaniel Son, LLCJUSTIN MICHAEL CIFELLI

In-app purchases

2 purchases

PepStack

Subscriptions2
  • PepStack Pro Monthly$4.991 Month
  • PepStack Pro Annual7 Days trial$29.991 Year
None

Peptide Protocol+

No in-app purchases

Questions

Is PepStack free?
PepStack is free to download, with in-app purchases available.
Is Peptide Protocol+ free?
Peptide Protocol+ is free to download, with no in-app purchases.
Do PepStack or Peptide Protocol+ have ads?
Neither PepStack nor Peptide Protocol+ shows ads.

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