Halflife - Peptide & GLP-1 Log

Halflife - Peptide & GLP-1 Log

Tracker & Syringe Calculator

50 ratings
4 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • May 8, 2026
  • July 21, 2026

Features

Halflife - Peptide & GLP-1 Log screenshot #1 for iPhone
Halflife - Peptide & GLP-1 Log screenshot #2 for iPhone
Halflife - Peptide & GLP-1 Log screenshot #3 for iPhone
Halflife - Peptide & GLP-1 Log screenshot #4 for iPhone
Halflife - Peptide & GLP-1 Log screenshot #5 for iPhone
Halflife - Peptide & GLP-1 Log screenshot #6 for iPhone
Halflife - Peptide & GLP-1 Log screenshot #7 for iPhone
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About

Manage complex health protocols involving peptides, TRT, and longevity compounds. Track dosing, inventory, and biological effects with detailed pharmacokinetic modeling. Integrates with Apple Health for comprehensive wellness insights.

Multi-compound protocol tracking
Pharmacokinetic concentration curves
Dose scheduling and adherence
Vial inventory management
Syringe calculator
Apple Health integration
Compound database
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What's New in Halflife

1.7

July 21, 2026

After we got asked a lot, we added compounds such as caffeine and more, as well as a calendar now! We also added retroactive dose logging, so you can bring your history with you. Lots (and we mean a LOT) of QoL improvements. A few bug fixes. And more! If you have features you want, please contact us at contact@halflife-labs.com

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Subscription plans

Halflife Premium

Unlock your full biological Potential!

$9.997 Days
How to cancel Halflife subscription ⁉️

User reviews

Great app

I really like this app. It made my life easier and less stressful trying to remember so many numbers.

Response from developer

Thank you for your Review! We will add this on our next Patch. Can you please explain exactly what you mean by higher ml/mg? Either edit your Review, or better contact us at contact@halflife-labs.com . We will fix it for you!

Good but not great.

Overall, the app is well designed and easy to use. However, there are two areas that significantly impact usability and should be prioritized for improvement.

1. Database Access
Currently, accessing the database takes the user out of the app and into an external browser/page. This creates a fragmented experience, interrupts workflow, and makes the platform feel less integrated. Keeping database access within the app would provide a much smoother user experience and encourage more frequent use of the feature.

2. Backdating Missed Injections
The inability to backdate a missed injection entry is a major limitation. In real-world use, users occasionally forget to log a dose at the exact time it was administered. Preventing backdated entries can lead to inaccurate records, incorrect half-life calculations, and reduced confidence in the tracking data. Allowing users to enter a past injection date and time would improve both accuracy and long-term adherence to tracking.

Of these two issues, the inability to backdate injections has the greatest impact because it directly affects the accuracy of the data the app is designed to track. For an application focused on medication management, maintaining accurate historical records should be considered a high-priority feature.
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Response from developer

Both of the issues will be adressed in the next update, hopefully we can make your experience way better in the upcoming Patch! Thank you for your Review!

Good and doesn’t charge money free

Good

Response from developer

Thanks for the Review! :) If you have any recommendations of how we can expand the free tier, and make it even better please write to us at contact@halflife-labs.com

Key for research-backed insights on protocols

This app is great and I see improvements happening all the time too. It changed the game for me coming from a spreadsheet tracker.

Response from developer

Thank you, we appreciate your Review! There is still lots coming...for both free and pro. Look out for our next update in June, where we will launch "Pods" - Where you can track and compete with your friends in a group !

Developer apps

FAQ

What is Halflife?

Halflife is a health tracking app designed to unify multi-compound protocols. It helps users manage dosing, pharmacokinetics, inventory, and real-world performance for substances like GLP-1 medications, peptides, and TRT.

How does Halflife track compound levels?

Halflife uses published pharmacokinetic data to model active compound levels over time. It displays each compound as a live curve showing time to peak, current activity percentage, and clearance trajectory.

Can Halflife integrate with other health apps?

Yes, Halflife integrates with Apple Health to connect sleep, HRV, heart rate, and weight trends with your dosing history for a comprehensive view of your wellness.

What are the subscription options for Halflife?

Halflife offers several subscription plans including 'Halflife Premium' at $9.99/P7D, 'Halflife Pro Annual' at $34.99/P1Y, and another 'Halflife Pro Annual' at $44.99/P1Y, unlocking unlimited protocols and full analytics.

Is Halflife available on Android?

Based on the provided data, Halflife is currently supported on iPhone and iPod, indicating it is an iOS-exclusive application.

How often is Halflife updated?

The latest version of Halflife is 1.6, and it was last updated on June 7, 2026. This suggests a relatively active development cycle.

What is the user rating for Halflife?

Halflife has an impressive rating of 4.9 stars based on 27 ratings, indicating a high level of user satisfaction with the app's functionality and performance.

Does Halflife have ads?

No, the application data indicates that Halflife does not contain advertisements, providing an ad-free user experience.