Shotsy App Review: Pricing, Compounded Units & Best Free Alternatives

Managing a GLP-1 medication like semaglutide (Ozempic, Wegovy) or tirzepatide (Mounjaro, Zepbound) requires remembering injection days, tracking titration escalation schedules, rotating injection sites, and monitoring weight loss plateaus. Shotsy became one of the earliest dedicated iOS apps to address this need.

However, as more patients transition to compounded semaglutide or tirzepatide to avoid shortages and retail costs, and as users express frustration with recurring subscriptions for basic utility apps, many wonder: Is Shotsy Pro worth $19.99 every year, or is a free alternative better? Here is our exhaustive, hands-on review.

1. What Is Shotsy and Who Is It Designed For?

Shotsy is an iOS-exclusive medication logging utility designed specifically for patients on GLP-1 receptor agonist injections. Its interface revolves around an interactive calendar where you record the date, medication brand, dosage, and body site (abdomen, thigh, or upper arm) of each injection.

Shotsy is primarily designed for:

• Brand-name autoinjector pen users: Patients prescribed fixed-dose single-use pens (e.g., Wegovy 2.4 mg or Zepbound 15 mg) who only need to record a single number once a week.
• Apple Watch owners: Users who want a wrist complication displaying days until the next injection.
• Visual loggers: Patients who want a simple graph showing estimated medication concentration decaying over the 7 days between shots.

2. Shotsy Pricing Breakdown: Free vs Shotsy Pro ($19.99/Year)

While Shotsy is listed as a “Free” download on the Apple App Store, its free tier is strictly limited. Many core features that users expect from a medical utility are paywalled under Shotsy Pro.

3. The Compounded Units Flaw: Why Syringes Confuse Shotsy

By far the biggest functional limitation of Shotsy in 2026 is its lack of support for compounded semaglutide and compounded tirzepatide.

When you take brand-name Wegovy or Zepbound, your autoinjector delivers a predetermined milligram dose with the press of a button. But due to FDA drug shortages and commercial insurance exclusions, over 40% of GLP-1 users now receive compounded vials from 503A and 503B pharmacies (such as Hallandale, Red Rock, or Empower).

These medications do not come in pre-set pens; patients draw liquid using a standard U-100 insulin syringe marked in units (where 100 units = 1.0 mL). Crucially, the number of units required depends strictly on the vial’s concentration:

• For a 2.5 mg/mL semaglutide vial, a 0.25 mg dose is 10 units.
• For a 5.0 mg/mL semaglutide vial, a 0.25 mg dose is 5 units.
• For a 10 mg/mL tirzepatide vial, a 2.5 mg dose is 25 units.
• For a 20 mg/mL tirzepatide vial, a 2.5 mg dose is 12.5 units.

In Shotsy, there is no field to specify your vial concentration or input syringe units. The app only accepts milligrams. This forces patients to manually calculate their syringe draw on a separate calculator or scratch paper every time their pharmacy ships a new vial concentration, opening the door to dangerous tenfold dosing calculation errors.

In contrast, GLPme was engineered specifically with built-in concentration conversion: you select your vial strength once, and the app calculates the exact syringe line for you.

4. Pharmacokinetics & Estimated Blood Level Curves

One of Shotsy Pro’s primary selling points is its visual graph showing estimated medication levels in your bloodstream over time. How accurate is it?

Both semaglutide and tirzepatide have an elimination half-life of approximately 5 days (120 hours). When injected subcutaneously, peak plasma concentration (Cmax) occurs between 24 and 72 hours post-dose. Because the weekly dosing interval (7 days) is shorter than the time required for complete clearance (which takes 4 to 5 half-lives, or 25 to 30 days), repeated weekly doses accumulate until reaching a steady-state equilibrium at roughly 4 to 5 weeks.

Shotsy models this standard one-compartment pharmacokinetic decay curve well, giving patients a helpful visual representation of why “food noise” and appetite often creep back on days 5, 6, and 7 before the next shot. However, locking this basic mathematical formula behind a $19.99/year subscription is difficult to justify when free client-side pharmacokinetic calculators perform identical math in any web browser.

5. Data Privacy: Where Does Your Health Data Go?

Medical data regarding GLP-1 usage is highly sensitive. Many patients prefer not to disclose their medication status to employers, insurers, or data brokers.

According to Shotsy’s App Store Privacy nutrition label, the app collects:

• Usage Data & Product Interaction: Analytics events tracking which screens you tap and how often you open the app.
• Diagnostics & Crash Logs: Performance data transmitted to third-party monitoring services.

While standard for commercial iOS apps, contrast this with GLPme’s architecture: GLPme is 100% on-device and offline-first. There is no account registration, no remote user database, no advertising identifiers, and zero medical data transmission. Your dose logs and weights live exclusively in your iPhone’s encrypted local storage and Apple Health database.

6. Feature Matrix: Shotsy vs GLPme vs DoseDiary

Here is how the top three GLP-1 companion apps stack up across the features that matter most to patients:

7. The 3 Best Free Alternatives to Shotsy in 2026

1. GLPme — Best Overall Free iOS Alternative

For iPhone users seeking a dedicated GLP-1 companion without subscription fees, GLPme is the most complete alternative available. It includes core dose logging, bidirectional Apple HealthKit weight sync, 5-day pharmacokinetic decay curves, injection site rotation, and clinician export reports at zero cost.

Crucially, GLPme is built with native compounded vial math: simply input your vial strength (e.g. 5 mg in 2 mL) and your dose in mg, and GLPme automatically calculates your exact U-100 syringe marks. It also features a daily protein target tracker to prevent the muscle wasting observed in GLP-1 clinical trials.

Download GLPme free on the App Store →

2. DoseDiary — Best Cross-Platform Alternative (Android & iOS)

If you use an Android smartphone or switch between iOS and Android, Shotsy will not work for you. DoseDiary offers solid cross-platform support with an intuitive calendar view, dose reminders, and body site rotation tracking.

3. Apple Health + Happy Scale — Best Zero-App DIY Stack

If you don’t want to install another dedicated medication app, you can create a reliable free stack using Apple’s native tools: use Apple Health Medications to set up weekly injection reminders and log dose dates, paired with Happy Scale to track moving-average weight trends without emotional scale anxiety.

8. Final Verdict: Should You Buy Shotsy Pro?

You should consider Shotsy Pro if:

• You take brand-name autoinjector pens (Wegovy, Ozempic, Zepbound, Mounjaro) and never deal with compounded vials.
• You actively use Apple Watch complications to monitor your injection schedule.
• A $19.99 annual subscription fits comfortably within your health budget.

You should choose GLPme instead if:

• You take compounded semaglutide or tirzepatide and need automatic U-100 syringe unit math.
• You want bidirectional Apple HealthKit weight sync and pharmacokinetic decay curves without paying an annual subscription.
• You care deeply about data privacy and want an offline-first app that never collects analytics or sends medical data off your device.
• You want to protect lean muscle mass by tracking daily protein targets alongside your injections.

Frequently Asked Questions