Comparison

PepLog vs Peptide Library and Tracker

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

Head to head
About

PepLog

This app simplifies tracking complex peptide protocols by managing schedules, sending timely reminders, and allowing one-tap dose logging. It supports multiple peptides, provides a full dose history, and estimates supply duration to prevent running out.

Highlights
  • Flexible peptide scheduling
  • Home screen widget for quick logging
  • One-tap dose logging
  • Multi-peptide protocol support
  • Smart dose reminders
  • Full dose history
  • Supply duration calculation
Features
Read full description

Staying consistent is the hardest part of any peptide protocol. You're juggling multiple compounds, different frequencies, varying dose times — and one missed dose can throw off your entire schedule. PepLog exists so you never have to keep track of it all in your head. HOW IT WORKS Set up your protocol once and let PepLog handle the rest. It builds your schedule, sends you reminders at the right times, and lets you mark doses as taken with one tap — from a Home Screen widget, without even opening the app. WHAT YOU GET Flexible Scheduling — Daily, alternating days, every N-days, or specific weekdays. Configure one to four doses per day with custom dose times. Home Screen Widget — See today's pending and completed doses at a glance. Peptide name, amount, and time — all visible without opening the app. Tap to log instantly. One-Tap Dose Logging — Mark doses complete from the widget or inside the app. No forms, no friction. Multi-Peptide Support — Run multiple protocols simultaneously, each with its own frequency, dosage, and schedule. Smart Reminders — Get notified at your exact dose times so nothing slips through the cracks. Full Dose History — A complete, timestamped log of every dose across all your experiments. See what you took, when, and how much. Supply Duration — Know how many days your vials will last so you can reorder before running out. Your protocol, on autopilot.

About

Peptide Library and Tracker

This app serves as a comprehensive guide and lab assistant for peptide research. It offers a detailed peptide library, dose calculation tools, and advanced tracking features for logging, inventory management, and protocol adherence. Users can also access educational content and community Q&A to enhance their research workflow.

Highlights
  • Comprehensive Peptide Library & Database
  • Advanced Peptide Dose Calculator
  • Smart Tracking & Calendar View
  • Lab Inventory Management
  • Protocol Tracking & Lab Assistant
  • Integrated Peptide Education
Features
Read full description

Peptide Tracker and Library The all-in-one peptide calculator, peptide tracker, and research library for protocols, inventory, and precise dosing. Calculate, log, and stay consistent — in one research tool. PEPTIDE CALCULATOR Convert mg, mcg, and IU. Calculate reconstitution, vial concentration, injection volume, and multi-peptide stacks. Save recent calculations for the next session. PEPTIDE TRACKER Log every dose with time and notes. Set schedules and reminders. Use the calendar to review cycles, streaks, and missed doses. Track symptoms and journal entries alongside each protocol. INVENTORY See how much is left in each vial, capsule, or spray. Get low-stock and reorder alerts. Inventory updates when you log a dose. RESEARCH LIBRARY Browse a peptide database with protocols, mechanisms, reconstitution notes, PubMed references, and molecular data. Open Peptide School courses, guides, and FAQs when you want structured learning. VENDOR PRICES Search supported vendors, compare price per mg, check stock, and unlock available discounts — without leaving the app. PROGRESS Log weight, body composition, and progress photos. Charts show how your research notes change over time. BUILT FOR RESEARCH WORKFLOWS Fast search. Offline use. Optional account sync. Local-first storage. For research and educational purposes only. Not medical advice. Not for human consumption. Consult a qualified professional before any protocol. Subscription Information Pro Monthly — $5.99/month Pro Yearly — $49.99/year Subscription auto-renews unless turned off 24 hours before the end of the current period. Manage subscriptions in your App Store account settings. Privacy Policy: https://peptidelibrary.app/privacy EULA: https://peptidelibrary.app/terms

Screenshots

PepLog4 screens
Peptide Library and Tracker4 screens

Verdict

The call

The clearest difference is rating: Peptide Library and Tracker at 4.7 against PepLog's 4.0. Peptide Library and Tracker also leads on review sentiment (86% vs 50%) and update cadence (every 10 days vs every 3 months). On price, ads, in-app purchases and monetization model 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. PepLog sells 1 one-off in-app purchase and Peptide Library and Tracker 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

Peptide Library and Tracker holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Peptide Library and Tracker has 25 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of PepLog's written reviews are positive against 86% of Peptide Library and Tracker's.

UpkeepUpdate frequency

PepLog ships an update every 3 months, Peptide Library and Tracker every 10 days. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
PepLog versus Peptide Library and Tracker: the parameters behind the verdict, then further details
ParameterPepLogPeptide Library and Tracker
PriceFreeFree
Rating4.0 (2 ratings)4.7 (25 ratings) — better
Positive reviews50.0% of reviews85.7% of reviews — better
Number of ratings225 — better
Update frequencyEvery 3 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.4
Further details — not scored
Size67 MB78 MB
Age rating17+17+
DeveloperRoberto YudiceSuperfime LLC

Customer experience

PepLog

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Peptide Library and Tracker

All ratings25 ratings
Positive92.0%
Neutral4.0%
Negative4.0%
Written reviews7 reviews
Positive85.7%
Neutral14.3%
Negative0.0%

In-app purchases

1 purchases

PepLog

One-time1
  • PepLog Pro Lifetime$4.99
2 purchases

Peptide Library and Tracker

Subscriptions2
  • Peptide Library Pro Monthly7 Days trial$4.991 Month
  • Peptide Library Pro Yearly7 Days trial$39.991 Year

Questions

Is PepLog free?
PepLog is free to download, with in-app purchases available.
Is Peptide Library and Tracker free?
Peptide Library and Tracker is free to download, with in-app purchases available.
Which has better reviews, PepLog or Peptide Library and Tracker?
Peptide Library and Tracker is rated higher. PepLog averages 4.0 out of 5 from 2 ratings, while Peptide Library and Tracker averages 4.7 from 25 ratings.
Do PepLog or Peptide Library and Tracker have ads?
Neither PepLog nor Peptide Library and Tracker shows ads.
Which is updated more often, PepLog or Peptide Library and Tracker?
PepLog ships an update every 3 months, and Peptide Library and Tracker every 10 days. Most recently, PepLog was updated on October 24, 2026 and Peptide Library and Tracker on October 24, 2026.

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