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The short version
If you take one GLP-1 and want a free shot log on iPhone or Android, Shotsy covers that well: its logging, reminders, site rotation, side effects, and weight charts are free with no time limit.1 Kairo is iPhone-only and leans toward protocols: built-in half-life data for 60+ compounds, peptides included, a reconstitution calculator, stacks and cycles, and labs. Its free plan covers your main medication plus two more compounds and includes an estimated medication curve.
Side by side
| As of October 3, 2026 | Kairo | Shotsy |
|---|---|---|
| Platforms | iPhone (iOS 18 or later) | iPhone and Android1 |
| Free dose logging, reminders, site rotation, side effects, weight trend | Yes, for your main medication plus two more compounds | Yes, with no time limit1 |
| Estimated medication-level chart | Free for your first 14 days, then your current dose cycle; full history and projection with Pro | Included with Shotsy+1 |
| Built-in level estimates | Published half-life data for 60+ compounds, peptides included | Semaglutide, tirzepatide, liraglutide, and dulaglutide products, per its App Store listing2 |
| Apple Health | Pro | Shotsy+ (Health Connect on Android)1 |
| Food and nutrition | Not tracked (water is) | Calories, protein, and water2 |
| Account on iPhone | None required; records stay on your device | None required; entries stored in your private iCloud3 |
| Exports | CSV and encrypted backup free; clinician PDF with Pro | CSV and PDF exports2 |
| Paid plan, U.S. App Store | Kairo Pro: $29.99/year or $5.99/month | Yearly purchases listed at $39.99 and $59.99; monthly at $9.99 to $19.992 |
Features and prices change. Check each app’s current App Store listing before you decide. Kairo’s prices come from the App Store and may differ outside the U.S.
Where Kairo is different
Built-in pharmacokinetics for 60+ compounds
Kairo ships with published half-life data for 60+ compounds, from GLP-1 medications to peptides and hormone protocols, so the estimated curve works without entering values yourself. For compounds without a published value, you can enter your own estimate. Curves are estimates from your logged doses, not blood levels.
A reconstitution calculator
Free arithmetic on the numbers you enter, such as the vial amount and the water you add, with a visual syringe. It calculates; it doesn’t suggest a dose.
Stacks, cycles, and off days
Run several compounds side by side, each with its own schedule, including patterns like 5 days on and 2 off and planned off days. Free covers your main medication plus two more compounds; Pro is unlimited.
Labs next to your protocol
Log lab markers and follow them over time alongside your doses and weight.
Lock Screen and Siri
Ask Siri to log a dose or tell you when the next one is due. With Pro, a Live Activity counts down to your next dose and lets you log it from the Lock Screen.
A sourced compound library
104 compound guides, each citing its sources, with human studies, animal work, and lab findings labeled separately. Kairo identifies compounds; it doesn’t recommend them.
Your log stays on your phone
Kairo has no account and no Kairo server holding your log. Optional AI features, part of Pro, send only what you choose, after you consent.
Where Shotsy may suit you better
- You use Android, or want your log on several devices. Shotsy runs on both platforms and syncs across your devices through iCloud on iPhone.1,2 Kairo is iPhone-only and doesn’t sync between devices.
- You want food tracking. Shotsy tracks calories and protein.2 Kairo doesn’t log food.
- You take one GLP-1 and the free basics are all you need. Both apps cover that. Shotsy’s free tier also includes its advanced analytics and detailed charts.1
Moving from Shotsy to Kairo
Kairo imports Shotsy’s CSV export, including its one-row-per-day layout and the Shot column that combines medication and dose. You review the columns before saving, original dates are kept, and you can undo the import. Importing is free. Follow the step-by-step guide.
Sources
- Shotsy, “Free GLP-1 Tracker” page, last updated September 2026. Checked October 3, 2026.
- Shotsy GLP-1 Tracker on the U.S. App Store: description, in-app purchases, and version history (version 3.3.9). Checked October 3, 2026.
- Shotsy privacy policy. Checked October 3, 2026.
- Kairo features and prices: Kairo Free vs Pro and Kairo on the App Store.
Shotsy is a trademark of its owner. Kairo and Opportune Labs are not affiliated with, endorsed by, or sponsored by Shotsy. This comparison uses Shotsy’s public website and App Store listing; corrections are welcome at support@opportunelabs.app.
Educational information, not medical advice. If something feels urgent or wrong, contact your clinician or emergency services.