What the live search results reward
On June 11, 2026, a non-personalized Google desktop search from Vienna, Austria placed Regimen’s comparison article first for “best peptide tracker app.” Halflife was not in the first ten organic results for that query. Exact United States rankings are unknown because rankings vary by location, device, language, history, and time.
Regimen ranks because its page answers the buyer’s question directly: it defines criteria, names trade-offs, gives “best for” recommendations, shows a comparison table, timestamps its verification, and links into competitor-specific comparisons. This page uses the same useful structure while refusing to convert vendor claims into unqualified facts.
At-a-glance comparison
| App | Best fit based on public information | Platform | Known facts and unknowns |
|---|---|---|---|
| Halflife | iPhone users who prioritize multi-compound logs and estimated remaining-level curves | iPhone; Apple silicon Mac and Vision compatibility are listed | Known: free with IAP, 5.0 from 26 ratings, iOS 15.1+, Data Not Collected. Count conflict: App Store says 45 substances; public database documents 44. |
| Regimen | Users who want native iOS and Android support with broad health-data workflows | Vendor says iOS and Android | Vendor pages conflict: homepage says PK modeling for 40+ compounds; its comparison article says a 150+ library. Exact current count is unknown. |
| PeptIQ | Users who want mobile plus web access and a very broad education/tool ecosystem | Vendor says iOS, Android, and web | Known from vendor: calculator, injection logging, health integrations, and extensive guide network. Independent performance is unknown. |
| PepTracker | Users who want protocol building, scheduling, and a free two-protocol tier | Vendor links to app marketplaces | Known from vendor: dose calculator, calendar, reminders, progress, two free protocols. Exact current store availability by country is unknown. |
| Smart Peptide Tracker | Android users who prefer a one-time premium unlock over a subscription | Google Play listing confirmed | Known: 5K+ Google Play downloads, ads/IAP, updated June 5, 2026. iOS feature parity is unknown here. |
| Shotsy | People tracking GLP-1 treatment rather than broader peptide stacks | Vendor links iOS and Android | Known from vendor: 1M+ downloads, 4.9 rating, GLP-1 focus, dose/side-effect/progress tracking. Exact rating count was not shown on its site. |
Primary sources: Halflife App Store listing, Regimen official site, PeptIQ official site, PepTracker official site, Smart Peptide Tracker Google Play listing, and Shotsy official site.
How to choose without trusting a winner badge
Match the app to the protocol
A GLP-1-only tracker can be excellent for GLP-1 care and still be the wrong tool for a mixed peptide, TRT, or insulin protocol.
Ask what a curve means
Consumer apps generally display model estimates, not measured blood concentrations. Ask which half-life, absorption, and route assumptions are used.
Confirm your exact device
“Available on mobile” is not precise enough. Verify iPhone, Android, web, tablet, and regional availability in the current official listing.
Check export and deletion
Confirm whether you can export dose history, cancel easily, delete data, and retain useful records without a subscription.
Where Halflife is strongest and where it is not
Strong fit: Halflife’s current App Store listing documents unified multi-compound logging, estimated curves, vial inventory, injection-site rotation, Apple Health integration, four free tools, local storage, and a two-compound free tier.
Not the best fit: Halflife is not currently listed as a native Android app. Shotsy has a much larger publicly claimed download base and a dedicated GLP-1 workflow. PeptIQ publicly presents a larger education and tool ecosystem. Smart Peptide Tracker publicly presents broader compound counts. Regimen publicly presents native cross-platform support.
Unknown: independent head-to-head reliability, retention, support response time, calculation accuracy under every route and formulation, and exact feature parity across competitors have not been established by a neutral test. Any “best” recommendation is therefore conditional, not absolute.
Frequently asked questions
What is the best peptide tracker app?
There is no universal best app. Halflife is a strong fit for iPhone users who want multi-compound logs and estimated curves. Regimen and PeptIQ advertise broader cross-platform ecosystems, Smart Peptide Tracker emphasizes Android and one-time pricing, and Shotsy focuses on GLP-1 tracking.
Is Halflife a free peptide tracker app?
The current Apple App Store listing says Halflife is free with in-app purchases and that its free tier includes two compounds, full logging, weight tracking, four free tools, an adherence calculator, and community access.
Does a peptide tracker show the exact amount in the body?
No consumer tracker can establish an exact individual blood concentration from a dose log alone. Curves are estimates based on model inputs such as half-life, route, timing, and assumptions.
Which peptide tracker works on Android?
Regimen, PeptIQ, Smart Peptide Tracker, PepTracker, and Shotsy publicly indicate Android availability or link to Google Play. Halflife’s current official listing is for iPhone; native Android availability is not currently known.
Keep the complete record in one place
Halflife - Peptide & GLP-1 Log organizes injection logs, schedules, vial inventory, sites, symptoms, and clearly labeled estimates on iPhone.
Download Halflife - Peptide & GLP-1 Log