# Halflife - Peptide & GLP-1 Log — Tracker & Syringe Calculator > Unified log for multi-compound health protocols, tracking dosing, pharmacokinetics, and inventory. (iPhone/iPad app by Ziad Soliman.) - Source: https://appshunter.io/ios/app/halflife-peptide-and-glp-1-log/id6763921857 (this page in markdown: same URL + `.md`) - Developer: [Ziad Soliman](https://appshunter.io/developer/1892230531) - Category: Health & Fitness, Medical - Price: Free with in-app purchases - Rating: 4.90/5 from 50 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 15.1 · 59 MB - Languages: American English - Released: 2026-05-08 - Data updated: 2026-08-23 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/halflife-peptide-and-glp-1-log/id6763921857/reviews.md ## What is Halflife? If tirzepatide, peptides, TRT, insulin, nootropics, and longevity compounds are part of the same protocol, fragmentation becomes the limiting factor. Halflife unifies multi-compound protocols into a single system for dosing, pharmacokinetics, adherence, inventory, and real-world performance tracking. Core System Tracks complete protocol stacks across GLP-1 medications, recovery peptides, growth hormone secretagogues, testosterone replacement, insulin, nootropics, sexual health agents, and longevity compounds in one environment. Every compound is logged within a unified timeline with dose history, vial stock, and schedule position. Concentration Curves Uses published pharmacokinetic data from FDA labels and peer-reviewed research to model active compound levels over time. Each compound is displayed as a live curve showing time to peak, current activity as a percentage of peak, and clearance trajectory. Biological effect windows model downstream activity for short half-life peptides. Today Screen Central execution layer for all protocols. Shows due doses, week progression, remaining vial inventory, and one-tap logging. Injection site rotation tracked automatically. Integrated syringe calculator converts vial concentration and target dose into exact draw volume. Protocol Tools Synergy Matrix, Reconstitution calculator, Unit converter, Vial runway calculator, Adherence circle. Compound Database Medically cited library covering tirzepatide, semaglutide, BPC-157, TB-500, CJC-1295, ipamorelin, testosterone esters, insulin, nootropics, and longevity compounds. Biometric Intelligence Apple Health integration connects sleep, HRV, heart rate, and weight trends with dosing history. Community System Pods, Challenges, Daily polls, Community discovery. Data Model All data stored locally on device. Nothing transmitted externally. 45 substances across GLP-1s, peptides, GH secretagogues, TRT, insulin, nootropics, sexual health, and longevity stacks. Free tier: two compounds, full logging, weight tracking, 4 free tools, Adherence Calculator, Community Access. Advanced unlocks unlimited protocols and full analytics. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://halflife-labs.com/privacy/ ## Key features - Multi-compound protocol tracking - Pharmacokinetic concentration curves - Dose scheduling and adherence - Vial inventory management - Syringe calculator - Apple Health integration - Compound database ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Halflife Premium | $9.99 | per 7 days | | Halflife Pro Annual | $44.99 | per year | | Halflife Pro Annual | $34.99 | per year | ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/halflife-peptide-and-glp-1-log/id6763921857/reviews.md ### 5/5 — Great app *2026-06-18* I really like this app. It made my life easier and less stressful trying to remember so many numbers. **Developer response:** 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! ### 4/5 — Good but not great. *2026-06-17* 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. **Developer response:** 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! ### 5/5 — Good and doesn’t charge money free *2026-06-15* Good **Developer response:** 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 ### 5/5 — Key for research-backed insights on protocols *2026-05-25* This app is great and I see improvements happening all the time too. It changed the game for me coming from a spreadsheet tracker. **Developer response:** 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 ! ## Frequently asked questions about Halflife ### 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. ## Version history (last 5 releases) ### 1.7 — 2026-07-21 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 ### 1.6 — 2026-06-07 The big awaited Community update is here! Track with or against your friends using the new Pods & Challenges System! Community picks showing what people in the Halflife Labs Community actually use! 33 new Languages added! QOL Improvements! Light Theme coming in next Update ### 1.5.2 — 2026-06-06 The big awaited Community update is here! Track with or against your friends using the new Pods & Challenges System! Community picks showing what people in the Halflife Labs Community actually use! 33 new Languages added! QOL Improvements! Light Theme coming in next Update ### 1.5.1 — 2026-05-21 **Health Check-Ins added** Biometric Insights now use data from health check-ins **4 FREE TOOLS:** Synergy Matrix - See which compounds are not a good mix Vial Runway Calculator Dosage Unit Converter Reconstituion Vial Calculator **Database** Direct access to Halflife Labs medically cited Compound Database right from the app! **Bugfixes and Improvements** ### 1.5 — 2026-05-12 **Quicklog added** **Deeper Apple Health Integration & Biometric Insights** **Streak System improved** **Bugfixes and general improvements** ## More apps by Ziad Soliman - [instaFashion - Outfit Stylist](https://appshunter.io/ios/app/instafashion-outfit-stylist/id6762140871) - [Salahly: Car Maintenance](https://appshunter.io/ios/app/salahly-car-maintenance/id6789894911) All apps by Ziad Soliman: https://appshunter.io/developer/1892230531 ## Related topics [half life peptide](https://appshunter.io/ios/topics/half-life-peptide) · [hormona vida](https://appshunter.io/ios/topics/hormona-vida) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*