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Zuyu vs Shotsy: Two GLP-1 Trackers With Very Different Answers on Android

Updated 22 September 2026.

Shotsy is the most established app in GLP-1 tracking, with a large, long-running user base behind it. If you are comparing it against Zuyu, you are almost certainly weighing a mature, analysis-rich product against a newer, narrower one.

There is one fact that ought to shape that decision more than any feature list, and it is published in Shotsy's own privacy policy rather than in anybody's marketing: Shotsy's account requirement and storage arrangement are different on iPhone than on Android. If you are an Android user, the two apps are further apart than the feature tables suggest.

See how both sit in the wider category in our GLP-1 tracker app comparison.

Where they actually differ

The Android difference, in detail

Shotsy's privacy policy sets out two architectures. On iOS it states that no user account is required and that health entries live in a private iCloud database tied to your Apple ID, your iCloud, not the company's servers. That is a genuinely strong arrangement and close in spirit to what Zuyu does.

On Android, the same policy states that the app requires Google Sign-In and stores data in Google Firebase. The Play listing itself carries a sign-in-with-Google prompt. Firebase is infrastructure the developer controls, not storage you own. Shotsy is upfront about this; it is simply asymmetric.

Zuyu makes the same promise on both platforms. There is no sign-in screen on either, and the privacy policy states that medications, doses, symptoms, notes, weight and supply figures are not transmitted to Nb41 Labs, and that the app does not use iCloud Drive, CloudKit or any other cloud service to store or synchronize entries. The cost of that consistency is that Zuyu offers no cross-device sync at all. If you want your log on a phone and a Mac at once, Zuyu cannot do it and Shotsy can.

We should also be even-handed about our own processors. Zuyu is not a closed box: its privacy policy names Sentry for crash diagnostics and RevenueCat for subscriptions. What it says those services do not receive is your health entries. Zuyu's App Store privacy label declares only a "data not linked to you" section, purchase history, a user ID and diagnostics.

One thing we did not check: Shotsy's own App Store privacy label. We are not going to characterise what it declares without having read it. What its published privacy policy does say is that it uses Firebase Analytics, Mixpanel, AppsFlyer and Google Analytics among its processors, that it takes steps to avoid sending health entries through those tools, and that it does not sell personal information.

Where Shotsy is the better app

This section is not a formality.

Depth of analysis. Shotsy's paid tier estimates how much medication is in your system over time, using published clinical data, and charts your progress by dose level and by injection site. If understanding your own patterns is the job you are hiring an app for, Shotsy does more of it than Zuyu does.

Integrations. Shotsy reads from Apple Health and Health Connect, so weight and related metrics can arrive without retyping. Zuyu does not offer these connections.

Reach. Seventeen languages against Zuyu's English. A Mac app. Oral GLP-1 support on iPhone. And a large, long-running user base behind it, against an app released in September 2026, which is exactly what you would expect, but it is still a real difference in how much road-testing stands behind each product.

Maturity. Shotsy has been shipping and refining for far longer, and it shows in the parts of a tracking app that only matter once you have a year of history in it.

Shotsy's paid medication-level chart and Zuyu's free estimated-presence chart both do the same basic job: turning your dosing history into a picture of a rhythm rather than a list of dates. Shotsy's is built from published clinical data and goes further, letting you break it down by injection site as well as by dose.

Where Zuyu is different

One answer on both platforms. No account, no sign-in, nothing synced, on iPhone and Android alike.

Voice that stays on the phone. Zuyu's voice check-ins use the device's own speech recognition, and the app states it does not fall back to a network recognizer, if the device cannot recognise speech on-device, it says so rather than sending audio elsewhere. No audio file is saved and no transcript leaves the phone.

Export is free, permanently. Raw export of everything you have logged is in the free tier, along with backup and restore. Leaving is not a paid feature.

It runs on older iPhones and takes less room. iOS 15.1 against Shotsy's iOS 18.0 requirement, and 33.7 MB against 126.1 MB. If you are on an older device, this may decide it for you outright.

It is built around the appointment. Zuyu's structure is a short daily check-in feeding a clinician report, 7-day, 30-day and since-your-last-visit views, things worth mentioning, and questions for your clinician, with PDF, print and share in the paid tier. Information you log can be assembled, viewed, shared and printed as a clinician-ready report, exactly as it ships today; it is an organizational summary, not a clinical read of your data. Shotsy also produces a PDF summary; the difference is emphasis. Shotsy is organised around analysing your data, Zuyu around the twenty minutes you get with a provider.

Pricing

Zuyu publishes its price: Plus is $9.99 per month or $59.99 per year, stated on the App Store listing and in the terms. The free tier covers unlimited typed check-ins, medications, doses, injection sites and supply recording, raw export, and backup and restore.

Shotsy also has a real free tier, its own free-features page states you can use every free feature without entering a card. Its price is harder to pin down. Shotsy does not publish a price on its website, and its App Store listing has shown five concurrent subscription options: monthly at $9.99, $14.99 and $19.99, and yearly at $39.99 and $59.99. Which one you are offered is not something we can determine from outside, so check the listing before subscribing.

Which may fit you

Choose Shotsy if you want the most analysis of your own data, you want Apple Health or Health Connect to fill in numbers automatically, you need a language other than English, you want the app on a Mac as well as a phone, or you simply want the reassurance of the most-reviewed app in the category. On iPhone, its no-account arrangement is strong, and if cross-device sync matters to you, Shotsy offers it and Zuyu does not.

Choose Zuyu if you are on Android and want the same no-account arrangement that iPhone users get, you want nothing about your health entries leaving the device, you want voice logging that is processed on the phone, you want export included free and permanently, your phone is older or short on storage, or your main goal is walking into an appointment with a clear summary rather than studying charts between them.

Either works if you mainly want reliable dose, injection-site, side-effect and weight logging. Both do that competently. The decision is architecture and emphasis, not whether the basics are covered.

Questions people ask

Does Shotsy require an account?

On iPhone, no, its privacy policy states no user account is required and health entries are kept in your own private iCloud database. On Android, yes: the same policy states Google Sign-In is required and data is stored in Google Firebase.

Does Zuyu sync between my phone and tablet?

No. Zuyu has no cloud sync of any kind, by design, its privacy policy rules out iCloud Drive, CloudKit and other cloud services by name. Moving your record to another device is done through the app's own backup and restore, which is in the free tier.

Which is better for side effects?

Both track them. Shotsy records severity and can chart side effects against your dose level. Zuyu records symptoms in a daily check-in and surfaces them in the clinician report alongside the day you dosed.

Is Shotsy free?

It is free to download and has a genuine free tier. Some features, including the estimated medication-level chart, are in its paid tier.

Shotsy information was taken from its live App Store and Google Play listings, its website and its published privacy policy, most recently re-checked 22 September 2026. Shotsy is a trademark of its owner and is not affiliated with Zuyu or Nb41 Labs LLC.

See how Zuyu and Glapp compare if analysing your own data is what you are after.