Comparison

Pepdex vs PepstackAI

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

Head to head
About

Pepdex

Log peptides, supplements, nutrition, training, and weight with detailed tracking and an evidence-based library. An AI coach provides insights based on your data and research. Scan items to quickly log details.

Highlights
  • Track peptides, supplements, nutrition, workouts, and weight
  • Log compound and supplement vial levels
  • Scan labels for automatic data entry
  • Evidence-based library with research and side effects
  • AI Coach for personalized insights
  • Daily check-ins for mood, energy, and sleep
Features
Read full description

Pepdex is a peptide calculator and tracker that gets the units right. Enter your vial size, the water you added and your own dose, and Pepdex shows how much to draw: units on an insulin syringe, or mL on a standard one. The calculator never suggests a dose. The amount always comes from you and your clinician. FREE, NO ACCOUNT NEEDED • Syringe draw: the units or mL to draw for the dose you enter • Water planner: how much water to add so your dose lands on an easy line to read • Concentration, amount per unit and doses per vial • The peptide and supplement library, and the guides TRACK IT WITH PRO • Protocols on your own schedule for any peptide in the catalog, including GLP-1s, plus TRT or a compound you add yourself • A reminder when each shot is due, with an optional heads-up 30 or 60 minutes early • Vials that count down doses and days left as you log, and a heads-up when one runs low • A one-tap shot log and a calendar of logged, planned and missed shots • Supplements, food, water, workouts, weight and daily check-ins • Scan a vial or supplement label to fill in a new entry, or photograph a meal for a calorie estimate A LIBRARY THAT SHOWS ITS RESEARCH Peptide and supplement entries are graded by how much human research PubMed holds on them, with links to the papers, reported side effects and cautions. Many peptide entries also list questions worth asking a provider. Entries the research can't grade explain why. It is educational reference, not medical advice. ASK COACH Coach is an AI assistant for questions about a compound, a side effect or what the research found. A free account gets 10 Coach messages a day, and Pro includes more. Without an account, Coach answers from the catalog stored on your phone. Coach sees a summary of your tracking only while "Let Coach see my numbers" is on. You can turn that off in Settings and keep using Coach. APPLE HEALTH With your permission, Pepdex reads weight, steps, sleep and other data you choose to share from Apple Health, and, if you turn it on, saves the water you log to Health. FREE AND PRO Free: the calculator, the library and guides, and 10 Coach messages a day with a free account. Pro: tracking (protocols, vials, the shot log, shot reminders, supplements, food, water, workouts, weight and check-ins) and more Coach messages. Pro is an auto-renewing subscription with weekly, 3-month and annual plans. The 3-month and annual plans start with a 7-day free trial for new subscribers. Prices are shown in the app before you subscribe. Pepdex does not sell or ship peptides. It is an information and tracking tool, not medical advice. Talk to your clinician before you start, stop or change anything you take. Subscriptions auto-renew unless turned off at least 24 hours before the end of the current period. Payment is charged to your Apple Account at confirmation of purchase, or when a free trial ends. Manage or cancel in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://pepdex.co/privacy

About

PepstackAI

This app helps you manage your supplement intake based on your personal routine and health goals. It provides personalized recommendations with research-backed reasoning and schedules them around your daily activities, avoiding potential conflicts.

Highlights
  • Personalized supplement recommendations
  • Routine-based scheduling
  • Conflict flagging for supplements
  • Research-backed product information
  • Peptide reference library
  • Intake logging and data export
  • Offline functionality
Features
Read full description

Pepstack helps you take the right supplements at the right time, built around your real routine, not a generic label. HOW IT WORKS Tell Pepstack your goals, your diet, and anything that's bothered you before. It builds a personalized shortlist from a catalog of real, sourced products, every pick shows the reason it was chosen, whether that's your goal, your diet, or a reaction you flagged. YOUR SCHEDULE, NOT A GENERIC ONE Add anything to your daily schedule and Pepstack places it around your actual day, your meals, your sleep window, instead of just a flat list of times. Known timing conflicts (like zinc and iron needing space between them) are flagged before they become a problem. BUILT ON REAL RESEARCH Every product in the catalog links back to real, verifiable research citations, not marketing copy. Ask a question and get an answer sourced from that same catalog, with a way to report anything that looks wrong. A REFERENCE LIBRARY, NOT A DOSING TOOL Pepstack also includes a peptide reference library for research purposes: what each one is, its general category, and research trends. It does not provide doses, protocols, or injection guidance for peptides. TRACK WHAT YOU ACTUALLY TAKE Log what you've taken, see your streak, and export your own data whenever you want. Your account and everything in it can be deleted at any time, right from the app. Pepstack works offline for your day-to-day tracking and syncs when you're back online. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.pepstack.fit/privacy.html

Screenshots

Pepdex4 screens
PepstackAI4 screens

Verdict

The call

The clearest difference is update cadence: Pepdex at every 4 days against PepstackAI's every 11 days. On price, rating, review sentiment and ratings volume 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. Pepdex sells 2 in-app purchases, starting at $7.99 per month and PepstackAI sells 2 in-app purchases, starting at $4.99 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 Pepdex against 5.0 for PepstackAI. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Pepdex ships an update every 4 days, PepstackAI every 11 days. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

Scorecard1 real difference · 9 level
Pepdex versus PepstackAI: the parameters behind the verdict, then further details
ParameterPepdexPepstackAI
PriceFreeFree
Rating5.0 (6 ratings)5.0 (3 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings6 — better3
Update frequencyEvery 4 days — betterEvery 11 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.415.0 — better
Further details — not scored
Size68 MB18 MB
Age rating17+17+
DeveloperISMAEL JAVIER RUIZDeepak Kumar

Customer experience

Pepdex

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

PepstackAI

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Pepdex

Subscriptions2
  • Pepdex Pro Monthly7 Days trial$7.991 Month
  • Pepdex Pro Annual7 Days trial$79.991 Year
2 purchases

PepstackAI

Subscriptions2
  • Pepstack Pro (Monthly)$4.991 Month
  • Pepstack Pro (Yearly)$49.991 Year

Questions

Is Pepdex free?
Pepdex is free to download, with in-app purchases available.
Is PepstackAI free?
PepstackAI is free to download, with in-app purchases available.
Which has better reviews, Pepdex or PepstackAI?
Pepdex and PepstackAI are both rated 5.0 out of 5 on the App Store, from 6 and 3 ratings respectively.
Do Pepdex or PepstackAI have ads?
Neither Pepdex nor PepstackAI shows ads.
Which is updated more often, Pepdex or PepstackAI?
Pepdex ships an update every 4 days, and PepstackAI every 11 days. Most recently, Pepdex was updated on October 8, 2026 and PepstackAI on October 3, 2026.

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