Comparison

Peptide Plug vs Glapp

Glapp is the closest competitor to Peptide Plug on inventory, and the only one of the major GLP-1 trackers that publicly names a concept for the between-shot curve: “shot phases.” Both track vials and remaining doses. The differences are in reconstitution math, cost and clinical data.

Short version

Glapp is the stronger fit if you want native apps plus a web version and a well-designed view of where you are in the week between injections. Peptide Plug is the stronger fit if you reconstitute your own vials, want cost per dose and cost per month, or want lab values on the same timeline. Glapp describes itself as free and does not publish paid pricing; Peptide Plug is $4.99/mo or $49.99/yr, with a free tier for one active schedule.

Feature-by-feature

Based on Glapp's published product and pricing pages and this Peptide Plug build, reviewed September 9, 2026.

Feature	Peptide Plug	Glapp
Platforms	Installable web app for phone, tablet and desktop	Native iOS + Android + web
Free tier	1 active schedule, all public calculators, no card	Described as a free tracker
Published price	$4.99/mo or $49.99/yr	Paid pricing not stated on the site
Reconstitution math	✓ Full reconstitution, blend and syringe-unit math	Not stated
Cost per dose / run-out	✓ Cost per dose, per month and vial run-out forecasting	Not stated
Vial inventory	✓ Vials, diluent, in-app low-stock and mixed-vial expiry alerts	✓ Vial inventory, remaining doses, expiry dates
Lab tracking	✓ Manual labs with chart overlays	Not stated
Estimated levels	✓ Estimated level curve + public 86-compound half-life table	✓ Estimated concentration + “shot phases”
Side-effect logging	✓ Dose-linked effects	✓ Named side effects tracked
Weight / progress	✓ Weight, measurements, photos	✓ Weight loss progress and reports
Health-platform sync	Not offered	Not stated
Data export	✓ Full JSON export; CSV of the log, inventory and cost forecast on Pro	Not stated
Public calculators	✓ 17 free calculators, no account	Tirzepatide calculator + GLP-1 plotter

Sources: glapp.io. "Not stated" means the feature was not described on the pages reviewed. It does not confirm the feature is absent.

Where each one wins

Neither is better at everything. These are the honest trade-offs.

Pick Peptide Plug for

You reconstitute vials and need concentration and syringe-unit math, not just dose logging.
You want cost per dose and cost per month, which changes as you move up dose steps.
You want lab values plotted against your dose history.
You want your full history exportable as JSON or CSV.
You want a large set of free calculators that need no account at all.

Pick Glapp for

You want native iOS and Android apps as well as a web version.
“Shot phases” is a clear view of where you are in the week between injections.
You want a polished consumer weight-loss experience rather than a protocol tool.
You want vial inventory without paying for it: Glapp presents itself as free.

Which should you pick?

These two overlap more than any other pair on this site. If you use pre-filled pens and want the cleanest consumer experience, Glapp. If you mix your own vials or care what a dose costs, Peptide Plug.

Common questions

Do both track vial inventory?

Yes. This is the feature Glapp and Peptide Plug most obviously share. Both track vials, remaining doses and expiry. Peptide Plug additionally ties that inventory to reconstitution concentration and cost per dose.

What are Glapp's “shot phases”?

It is Glapp's name for where you are in the week between injections: rise, peak and fade. Peptide Plug shows the equivalent information as an estimated level curve in the Half-Life Visualizer, without the named framing.

Which is better for compounded vials?

Peptide Plug, because it carries the reconstitution math: vial strength divided by diluent volume, the resulting concentration, and the syringe reading that produces. Glapp's published pages do not state reconstitution support.

Is Glapp free?

Glapp presents itself as a free GLP-1 tracker and does not publish paid tiers on its site. Peptide Plug is free for one active schedule with Pro at $4.99 per month or $49.99 per year.

Can I export my data from either?

Every Peptide Plug account can export its full history as JSON, and Pro adds CSV exports of the log, inventory and cost forecast. Glapp's published pages do not state an export feature.

Try the free tools first

Every Peptide Plug calculator runs in your browser with no account and nothing stored.

Open the free tools

Tracking tool, not medical advice. Peptide Plug is an organization and calculation tool for adults 18 and older. It does not provide medical advice, diagnosis or treatment, and it does not recommend, suggest or verify any substance, amount, schedule or route. Calculators only perform arithmetic on the numbers you enter; double-check every result. Many compounds referenced on this site are not FDA-approved for human use, and products sold outside an approved supply chain are not verified for identity, purity or concentration. Peptide Plug does not sell, supply, source or link to sellers of any compound. Confirm every decision with a licensed clinician or pharmacist. In an emergency, call 911.

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