Peptide and GLP-1 tracking with compound intelligence.
Tirzepatide · Semaglutide · BPC-157 · Testosterone · Retatrutide · GHK-Cu
Halflife is a protocol tracking platform for people managing GLP-1 medications, peptides, and TRT. The app logs injections, calculates syringe volumes, tracks vial inventory, and visualizes an estimated remaining percentage over time.
Injection logging, estimated concentration curves, and dosage tools for peptide and GLP-1 protocols.
Halflife - Peptide & GLP-1 Log tracks peptide and GLP-1 injection schedules, dosage changes, and vial inventory from a single interface. Users managing tirzepatide, BPC-157, testosterone, and other compounds simultaneously can view overlapping estimated concentration curves and manage each protocol independently.
Structured profiles for 44 public peptides, GLP-1 medications, and related compounds.
View full database →Each compound profile includes plasma half-life, biological effect duration, administration context, evidence notes, and source citations. Half-life values are sourced from FDA prescribing labels, published clinical trial data, or peer-reviewed pharmacokinetic studies.
* Compounds marked with * display plasma half-life. Biological effect duration is tracked separately in the app.
No observational findings are currently published.
The current public cohort size, collection start date, observation windows, and analysis status are unknown. Halflife Labs will not publish outcome figures until the methods, sample, limitations, and review date can be stated exactly.
No case-study results are currently available.
Previously displayed interim figures have been withdrawn because their public methodology, cohort size, and verification status were not established. Unknown values will remain labeled unknown; modeled values will be labeled estimates.
Partnership inquiries about the public compound database.
Halflife accepts partnership inquiries. API, licensing, integration, and research-access availability are unknown until confirmed in writing.
Research Access
No protocol-outcome dataset is currently documented as available. Researchers may contact Halflife Labs to ask what, if anything, can be supported.
Ask about current availability →Telehealth Integration
No public API or white-label integration is currently documented. Technical availability, scope, and compliance requirements are unknown until confirmed in writing.
Talk to our team →Data Licensing
No longitudinal outcome-data product or IRB-reviewed data package is currently documented as available.
Ask about current availability →Frequently asked questions
What is Halflife?
Halflife is a free iOS app for tracking peptide, GLP-1, and TRT protocols. It logs injections, calculates syringe and reconstitution volumes, manages vial inventory, tracks injection-site rotation, and visualizes estimated medication-remaining curves based on each compound's published half-life.
Is the Halflife app free?
Yes. Halflife is free to download on iOS and requires no account. Core protocol records are stored locally on your device.
What compounds does Halflife track?
Halflife covers 44 compounds across 8 categories — GLP-1 and metabolic agents, recovery and repair peptides, growth-hormone secretagogues, TRT and hormones, insulins, nootropics, longevity compounds, and sexual-health peptides — including tirzepatide, semaglutide, BPC-157, testosterone, and retatrutide.
Where does Halflife's half-life data come from?
Each profile identifies its stated source and evidence tier. When a suitable human pharmacokinetic value is not known, the human value should be labeled unknown and any lower-confidence model should be explicitly labeled as an estimate.
Do I need an account, and is my health data private?
No account is required. Halflife stores core protocol records on-device and never requires sign-up, so your core protocol records remain on your phone unless you enable an optional data-sharing feature.
Track your peptide and
GLP-1 protocol.
Free on iOS. No account required.
