Comparison

PeptideJournal vs ColdStreak

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

ColdStreak

Track your cold plunges and build a consistent habit with this app. Log your sessions, earn achievements, and discover new cold water spots. Upgrade for advanced features and unlimited history.

Highlights
  • Cold plunge timer with automatic score calculation
  • Log temperature, duration, and location
  • Earn badges and achievements for consistency
  • Community leaderboards and location map
  • Offline functionality with data syncing
  • Optional Pro subscription for advanced features
Features
Read full description

ColdStreak is the ultimate cold plunge tracker for serious cold therapy practitioners and beginners alike. Whether you're just starting out or chasing daily ice baths, ColdStreak helps you build the habit, track your progress, and connect with a growing community of cold water enthusiasts. TRACK EVERY PLUNGE Start the built-in timer the moment you hit the water. Log temperature, duration, and location — then watch your Cold Score grow with every session. Every plunge counts toward your streak. EARN BADGES & ACHIEVEMENTS Unlock temperature tiers as you go colder — from Initiate at 50°F all the way to Ice Breaker below freezing. Stack daily streak badges as your consistency grows. Share your badge profile with anyone, no account required to view. COLD SCORE LEADERBOARDS See how you stack up against other plungers in your area or globally. Submit your sessions to community leaderboards tied to real cold plunge locations. FIND CHILL PLACES NEAR YOU Browse a community-built map of cold plunge spots — natural swimming holes, cold therapy studios, and verified business locations. Submit your own favorite spots and help the community grow. COLDSTREAK PRO Take it further with a Pro subscription: • Unlimited plunge history (free users get 7 days) • Music integration — auto-play your Spotify or Apple Music playlists with the timer • Bluetooth thermometer support — pair compatible devices like the Inkbird IBS-TH2 Plus to log exact water temperature in real time • Heart rate monitor support • Streak Freezes — protect your streak when life gets in the way • Advanced stats, personal bests, and CSV / Apple Health export • No ads • Submit to community leaderboards ColdStreak Pro is available as a monthly or annual auto-renewing subscription, or as a one-time Lifetime purchase. Subscriptions automatically renew unless turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. BUILT FOR EVERY COLD PLUNGER • Timer with automatic Cold Score calculation • Full plunge history with temperature and duration • GPS-based location tagging • Photo logging for each session • Works offline — your data syncs when you're back online The cold water is waiting. Start your streak today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://coldstreakapp.com/privacy

Screenshots

PeptideJournal4 screens
ColdStreak4 screens

Verdict

The call

The clearest difference is price: ColdStreak at Free against PeptideJournal's $5.99. ColdStreak also leads on rating (5.0 vs 4.3) and review sentiment (100% vs 63%). PeptideJournal's advantage is in-app purchases (none vs 5) and ratings volume (20 vs 5). On ads 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

ColdStreak is free to download; PeptideJournal costs $5.99 up front. ColdStreak sells 5 in-app purchases, starting at $3.99 per month. PeptideJournal asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ColdStreak holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 20 and 5 respectively. Written reviews point the same way: 63% of PeptideJournal's written reviews are positive against 100% of ColdStreak's.

UpkeepUpdate frequency

PeptideJournal ships an update weekly, ColdStreak every 2 days. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

Scorecard9 real differences · 1 level
PeptideJournal versus ColdStreak: the parameters behind the verdict, then further details
ParameterPeptideJournalColdStreak
Price$5.99Free — better
Rating4.3 (20 ratings)5.0 (5 ratings) — better
Positive reviews62.5% of reviews100.0% of reviews — better
Number of ratings20 — better5
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod, Apple Watch — better
Requires iOS17.615.6 — better
Further details — not scored
Size12 MB82 MB
Age rating17+4+
DeveloperChristopher MadridKevin Ellis

Customer experience

PeptideJournal

All ratings20 ratings
Positive80.0%
Neutral5.0%
Negative15.0%
Written reviews8 reviews
Positive62.5%
Neutral12.5%
Negative25.0%

ColdStreak

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

PeptideJournal

No in-app purchases

5 purchases

ColdStreak

Subscriptions4
  • ColdStreak Pro Monthly$3.991 Month
  • 1 Verified Location$29.991 Month
  • Verified Business 3 Locations$79.991 Month
Show 1 more
  • Up to 10 Verified Locations$129.991 Month
One-time1
  • ColdStreak Pro - Lifetime$19.99

Questions

Is PeptideJournal free?
PeptideJournal costs $5.99, with no in-app purchases.
Is ColdStreak free?
ColdStreak is free to download, with in-app purchases available.
Which has better reviews, PeptideJournal or ColdStreak?
ColdStreak is rated higher. PeptideJournal averages 4.3 out of 5 from 20 ratings, while ColdStreak averages 5.0 from 5 ratings.
Do PeptideJournal or ColdStreak have ads?
Neither PeptideJournal nor ColdStreak shows ads.
Which is updated more often, PeptideJournal or ColdStreak?
PeptideJournal ships an update weekly, and ColdStreak every 2 days. Most recently, PeptideJournal was updated on October 9, 2026 and ColdStreak on October 8, 2026.

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