Which GLP-1 trackers are good on iPhone?

On iPhone you have several solid options. Shotsy is polished and strongest on injection rotation and dose tracking, with widgets and PDF export. Pep is free to download and already covers doses, estimated levels, sites, side effects, nutrition, and progress photos. Glapp is free, ships an Apple Watch app, and leans into clinical-trial benchmarking and AI Q&A. Phaze covers doses, side effects, weight, food (with AI Meal Snap), Labs & Scans across 8 categories, Body Composition (Beta) with DEXA import, and an Apple Watch app with widgets and Live Activities, with encrypted iCloud backup. They all work with Apple Health for weight and activity. If you only need a clean injection tracker, Shotsy is a strong pick. If you want labs and body composition in the same app as your doses, Phaze is the broader fit. The watch app is the differentiator many people underrate, since logging a dose from the wrist takes a few seconds, and Phaze and Glapp both have one.