What is known
Shotsy's official site says it focuses on GLP-1 treatment, links iOS and Android, reports 1M+ downloads and a 4.9 rating, and includes PDF export, shot history, side effects, progress charts, dose planning, and injection rotation.
Halflife's current Apple App Store listing shows 5.0 from 26 ratings, free with in-app purchases, iOS 15.1+, and Data Not Collected. The listing says the free tier includes two compounds, full logging, weight tracking, four free tools, an adherence calculator, and community access.
Shotsy GLP-1 shot tracker vs a broader protocol log
The exact phrase "Shotsy GLP-1 shot tracker" describes Shotsy's strongest lane: weekly GLP-1 shots, side effects, progress, and injection rotation. Halflife is not trying to be a GLP-1-only journal. It is a broader protocol log for iPhone users who want GLP-1 records beside peptides, TRT, insulin, vial inventory, sites, and source-labeled estimated curves.
Primary sources checked June 19, 2026: Shotsy official source and Halflife App Store listing.
What is unknown
The exact rating count, independent accuracy of every feature, current premium price by region, and direct feature parity with Halflife are unknown from the cited page.
Exact individual medication or peptide concentrations are also unknown. Any curve shown by either product is a model estimate unless it is tied to appropriate measurement.
The practical trade-off
Shotsy’s narrow GLP-1 focus is a strength for that use case. Halflife’s broader compound model is a strength when GLP-1s, peptides, TRT, insulin, or other records need one timeline.
Decision checklist
- Verify your exact platform and region in the current official marketplace listing.
- Confirm that the exact compounds, routes, units, and schedules you use are supported.
- Check every calculator input and ask whether a displayed level is measured or estimated.
- Review export, deletion, privacy, subscription, and cancellation details before committing.
- Do not change a prescribed dose based on a consumer tracker estimate.
Verdict
There is no evidence-based universal winner between Halflife and Shotsy. The better choice is the one that matches the exact workflow, platform, and risk controls you require.
Frequently asked questions
Is Shotsy a GLP-1 shot tracker?
Yes. Shotsy is publicly positioned as a GLP-1 tracker for shots, side effects, progress, dose planning, and injection rotation.
What is a good Shotsy alternative?
Halflife can be a good Shotsy alternative for iPhone users whose priorities match Halflife's current official feature set. It is not automatically the better choice for every platform or workflow.
Is Halflife better than Shotsy?
That is not known as a universal fact. The products emphasize different workflows, and independent head-to-head reliability across every feature has not been established.
Are estimated remaining-level curves exact?
No. They are model estimates based on recorded doses and assumptions, not measured individual blood concentrations.