Comparison

F4L vs Bio Log Peptide Journal

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

Head to head
About

F4L

Access fitness programs and track your progress with this health and fitness application. Features include offline synchronization and personalized content. Manage your subscription easily through your account settings.

Highlights
  • Progress tracking
  • Offline sync
  • Subscription access
  • Personalized content
  • Account management
Features
Read full description

Fitness the natural way. INFORMATION ABOUT THE APP AND PURCHASE OPTIONS By signing up, you will get access to subscription(s) that include features such as progress tracking, and offline sync. The download of F4L is free of charge. No free trial offered. Should you use F4L app to access in-app content via available subscription(s), a payment will be charged to your credit card through your App Store account . A subscription renews automatically unless canceled at least 24 hours prior to the end of the subscription period. There is no increase in price when renewing. Subscription(s) can be managed and auto-renewal turned off in Account Settings in the App Store after purchase. Read our full Terms of Service and our Privacy Policy: https://passion.io/terms-of-service https://passion.io/privacy-policy

About

Bio Log Peptide Journal

This app provides a private journal for tracking peptides, compounds, and related health data. It helps organize schedules, vial notes, labs, and progress with AI-powered insights. It is for personal tracking and informational purposes only.

Highlights
  • Peptide and compound tracking
  • Dose logs and history
  • Schedule reminders
  • Vial and inventory notes
  • Side effect tracking
  • Lab and biomarker logging
  • Progress photos and notes
  • AI summaries and insights
Read full description

Bio Lab is a private peptide journal for people who want a clean way to track profiles, schedules, vial notes, reminders, labs, photos, side effects, and progress. Bio Log Membership is $3.99/month and unlocks the full app, including Bio Log AI. Use Bio Lab to track: - Peptides and compounds - Dose logs and history - Schedule reminders - Vial, lot, source, and inventory notes - Reconstitution notes and manual draw notes - Injection or usage sites - Side effects and symptoms - Labs and biomarkers - Progress photos and notes - AI summaries and insights from your own entries Bio Log AI can help organize your records, summarize logs, turn messy notes into clearer entries, explain app data in plain English, and help you review patterns in your journal. Bio Lab is for personal tracking, organization, and informational purposes only. It does not provide medical advice, diagnosis, treatment, dosing instructions, recommendations, peptide sourcing, or advice about what to take. AI-generated content may be incomplete or inaccurate and should not be used as medical guidance. Always consult a qualified healthcare professional before making decisions about medications, peptides, supplements, or research compounds. Subscription: Bio Log Membership Monthly is an auto-renewable monthly subscription for $3.99/month. It unlocks all app features, including peptide tracking, reminders, labs, inventory, photos, insights, and AI. Payment is charged to your Apple ID and renews monthly until canceled. You can manage or cancel anytime in App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://biolog-ai-backend.vercel.app/api/privacy

Screenshots

F4L3 screens
Bio Log Peptide Journal4 screens

Verdict

The call

The clearest difference is monetization model: F4L at free with in-app purchases against Bio Log Peptide Journal's subscription. F4L also leads on device support (3 vs 1) and ratings volume (6 vs 2). Bio Log Peptide Journal's advantage is ads (none vs shown). On price, rating and in-app purchases 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. F4L sells 1 in-app purchase, starting at $15.00 per month and Bio Log Peptide Journal sells 1 in-app purchase, starting at $3.99 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 F4L against 5.0 for Bio Log Peptide Journal. Both are backed by a comparable volume of ratings — 6 and 2 respectively.

Scorecard5 real differences · 5 level
F4L versus Bio Log Peptide Journal: the parameters behind the verdict, then further details
ParameterF4LBio Log Peptide Journal
PriceFreeFree
Rating5.0 (6 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings6 — better2
Update frequency—Every 2 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size61 MB4 MB
Age rating4+12+
DeveloperBAYLOR CONDEalexander rieger

Customer experience

F4L

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bio Log Peptide Journal

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

F4L

Subscriptions1
  • Fit 4 Life | All Access$15.001 Month
1 purchases

Bio Log Peptide Journal

Subscriptions1
  • Bio Log Membership$3.991 Month

Questions

Is F4L free?
F4L is free to download, with in-app purchases available.
Is Bio Log Peptide Journal free?
Bio Log Peptide Journal is free to download, with in-app purchases available.
Which has better reviews, F4L or Bio Log Peptide Journal?
F4L and Bio Log Peptide Journal are both rated 5.0 out of 5 on the App Store, from 6 and 2 ratings respectively.
Do F4L or Bio Log Peptide Journal have ads?
F4L shows ads; Bio Log Peptide Journal does not.

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