Comparison

PeptideJournal vs YDUN

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

Head to head
About

PeptideJournal

This app helps you precisely calculate peptide doses, manage your inventory, and track your usage history. It offers smart scheduling and detailed analytics, all while keeping your data private and secure on your device.

Highlights
  • Precision dose calculation
  • Reconstitution simulation
  • Inventory management
  • Dose history tracking
  • Usage analytics
  • Smart scheduling
  • Calendar integration
Features
Read full description

PeptideJournal — Precision Peptide Dosing, Scheduling, Inventory, and Tracking DESCRIPTION: PeptideJournal is a private, precision tracking app for peptide dosing, inventory, historical dose/data tracking and scheduling. Designed for individuals who value accuracy, consistency, and control, all data stays securely on your device with privacy as a core principle. KEY FEATURES: Precision Dose Calculator – Calculate exact doses with an interactive syringe gauge. Supports mg/mcg conversion with real-time volume calculation based on your vial concentration, plus weight logging. Reconstitution Simulator — Plan your reconstitution before mixing. Calculate concentration and doses based on vial size, BAC water volume, and peptide amount. Flexible Reconstitution – Supports single peptides and multi-peptide blends (combo vials) with precise reconstitution and individual component dose calculations. Inventory Management – Track single vials or combo vials (Blends) with accurate remaining volume and dose counts. Swipe to refill, archive, or repeat doses. Dose Entry History – Comprehensive records with timestamps, injection sites, notes, side effects, and benefits tracking. Usage Analytics – Monitor patterns, weight trends, and usage consistency over time. Dashboard Overview – Quick glance at today's scheduled doses, tomorrow's preview, and low-stock alerts. Smart Scheduling – Create flexible schedules: daily, specific days of week, custom on/off cycles, or every X days intervals. Set multiple doses per day with optional notifications. Tap notification banners to instantly log doses and track adherence. Calendar Integration – Visual calendar with scheduled and logged doses, reminders, and schedule management. Advanced Vial Tracking – Multiple vials of the same peptide are tracked independently for maximum accuracy. Complete Privacy – All data stays local on your device. No account required, no subscriptions, no data collection, no external servers. Import & Export – CSV import/export for backup and data portability. Native iOS Design – Built exclusively for iOS with SwiftUI and SwiftData. PERFECT FOR: Personal record keeping Tracking usage patterns Monitoring inventory levels Maintaining detailed logs Scheduling and adherence tracking Managing complex protocols Secure data management IMPORTANT MEDICAL DISCLAIMER: PeptideJournal is a personal tracking and logging tool only. It does not provide medical advice, diagnosis, or treatment recommendations. Always consult qualified healthcare professionals before making any medical decisions. This app is for personal record-keeping purposes only. PRIVACY & SECURITY: Your personal data never leaves your device. No account required, no subscriptions, no data collection, no external servers. Download PeptideJournal today and start your personal tracking journey with confidence and privacy.

About

YDUN

Features
Read full description

The Ydun app is the companion to your YDUN journey. Find your recent workout details, assessment results, and next session calendar.

Screenshots

PeptideJournal4 screens
YDUN3 screens

Verdict

The call

The clearest difference is price: YDUN at Free against PeptideJournal's $5.99. YDUN also leads on iOS requirement (15.0 vs 17.6). On update cadence, ads, in-app purchases 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

YDUN is free to download; PeptideJournal costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 8 level
PeptideJournal versus YDUN: the parameters behind the verdict, then further details
ParameterPeptideJournalYDUN
Price$5.99Free — better
Rating4.3 (20 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings20 — better—
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.615.0 — better
Further details — not scored
Size12 MB20 MB
Age rating17+4+
DeveloperChristopher MadridYdun SRL

In-app purchases

None

PeptideJournal

No in-app purchases

None

YDUN

No in-app purchases

Questions

Is PeptideJournal free?
PeptideJournal costs $5.99, with no in-app purchases.
Is YDUN free?
YDUN is free to download, with no in-app purchases.
Do PeptideJournal or YDUN have ads?
Neither PeptideJournal nor YDUN shows ads.
Which is updated more often, PeptideJournal or YDUN?
PeptideJournal ships an update weekly, and YDUN weekly. Most recently, PeptideJournal was updated on October 24, 2026 and YDUN on October 7, 2026.

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