Free GLP-1 tracker apps for iPhone: what each lets you do free

“Free” on the App Store usually means free to download. What a tracker lets you do before it asks for money is a different question, and the listings answer it with very different amounts of precision. This post reads what each app says about itself, in its App Store listing and on its own site, on 18 September 2026. Where an app does not say whether a feature is free, the post says that, because marketing copy leaves things out and nothing here comes from installing and paying for ten apps.

Which GLP-1 tracker apps say they are free to use?

Four make a clear free claim. Three sell a paid tier without saying where the line sits, and three list tracking among what a subscription buys.

No prices appear above on purpose. The App Store’s In-App Purchases panel lists promotional, regional and test variants beside the real offer, so a single figure lifted from it describes nobody’s checkout. Each listing is the place to check the current offer.

What does “free” cover in each case?

Shotsy’s FAQ is the most specific of the large apps. It says the app is “completely free to download and use” and lists the core features that cost nothing, and it keeps “premium tools” for people who want more. Its listing advertises estimated medication levels for semaglutide, tirzepatide, liraglutide and dulaglutide, and it does not say which side of that line they sit on.

GlucoPal’s listing answers “Is GlucoPal free?” with a yes, no account required, and an optional Pro subscription. It advertises an estimated medication-level chart and weight “shown as a weekly trend”. It does not list what Pro adds.

Flat Six’s Peptide Tracker makes the strongest free claim in the set and backs it with a purchase panel that holds only founding-member and tip items. It advertises an estimated level curve for each compound, a weight trend, reconstitution and syringe-unit calculators, and a community forum.

At the other end, PeptidePal and Pep AI say plainly that tracking is paid, and MeAgain’s own FAQ lists shot and pill tracking among the things MeAgain Premium includes.

What is free in Peptrend?

Every record you make, and most of the charts drawn from them. The free tier covers:

• Every dose and every weigh-in, with the full history lists.
• The In Your System chart on the Doses tab and the In Your System card on Home: a milligram estimate from your doses and a published half-life. Only the chart’s “Dose colors” button is Pro.
• The Next Shot card with its countdown ring, and one local reminder when a dose is due.
• The raw weight chart on the Scale Data screen, every weigh-in plotted.
• Apple Health weigh-in sync in both directions, and iCloud sync through your own private database.
• JSON import and export, and the vial history with the count of doses drawn from each vial.
• On Progress: target weight, duration, distance to goal, percent complete, and a weekly rate computed from raw scale entries.

The source code explains one of those decisions in a comment beside the vial list: taking away a record someone already saved “is not a paywall, it’s a hostage.” What stays free walks through every gate screen by screen.

What does Peptrend Pro add?

The weight trend line and everything built on it. The Weight Trend chart is Pro, and with it the smoothed current weight, weekly change, energy deficit, 30-day projection, the goal waterfall and the projected finish date. Pro also covers Advanced Mode, which opens all fifteen smoothing methods and their parameters, the reconstitution calculator (vial strength and water in, mg/mL out, and nothing more), the Dose Over Time chart, and the colour controls.

That is the honest limit of the free tier. It has no trend line. If a smoothed trend is the one thing you want without paying, GlucoPal and Flat Six both advertise weight trends, and neither listing says the trend sits behind a paywall.

Peptrend Pro is sold three ways on the App Store: $12.99 a month, $69.99 a year, or $99.99 once. The two subscriptions carry a 7-day free trial, and the app names the trial only after StoreKit confirms you are eligible for it. Lifetime has no trial.

Is a free level chart rare?

No. Eight of the ten apps in the table advertise some estimate of the medication in your system, and Flat Six’s is free by its own account. Where Peptrend’s differs is in what it shows you about the estimate. It names the model, a one-compartment curve with first-order absorption and elimination. It prints the half-life, time to peak and absorbed fraction it is using, links the FDA labels and papers behind most of its presets, and lets you edit all three. It scales a tablet by its absorbed fraction dose by dose, so a mixed history of injections and tablets adds up correctly. How much is still in your system explains the estimate and where it stops.

Does setup ask for money before you can log anything?

No. The welcome page asks you to tick a disclaimer box, and every page after it can be skipped. Three of them, the chart range, trend method and medication pages, carry a “Skip setup” button that ends setup at once. Whether you finish or skip out, setup ends on the Pro offer when there is a trial to show, and the offer has a “Not now” button. Either way, every free screen in the list above keeps working.

Reviews across this category complain about a long setup survey that ends at a price. Peptrend’s setup runs to about a dozen short pages and also ends on an offer, so the skips and the “Not now” button are worth knowing about before you start.

What does Peptrend not do at all?

Peptrend has no food logging, no side-effect journal beyond a 0 to 10 pain rating on injections, no progress photos and no PDF export. Shotsy, GlucoPal and MeAgain all advertise nutrition logging, and Shotsy advertises a PDF export for a doctor. Peptrend logs doses in milligrams only, with no mcg, IU or syringe-unit conversion. Its level chart follows one medication at a time. Shotsy advertises multiple simultaneous medications and PeptidePal and Flat Six advertise stacks. The reconstitution calculator stops at mg/mL and never works out a draw volume, by design.

If those gaps rule Peptrend out, the table above is a fair place to start. If what you want is a free dose log, a free level estimate, no account and a trend line you can check the maths of, the fifteen methods are public, and the privacy-label comparison and the 2026 roundup cover the rest of the field. Importing from Apple Health is the free way to bring a weight history across from another app.