See an estimate of how much medication is in your system over time. The number and the full curve are free — it's the heart of the app.
Enter your vial, your BAC water, and the dose you're drawing. Cusp does the concentration math and shows the units to pull on a standard insulin syringe.
Track every vial — when it was mixed, how much is left, and a gentle nudge as it runs low or nears the discard threshold you set. Cusp never picks that threshold for you.
Local-first, synced through your private iCloud. No ad tracking, no selling health data. Backup is free, always.
A body-map history of where your last shots went, so you can see your own rotation at a glance — including the full history, free.
Cost per vial, per mg, per dose — and how long your current stock lasts at your planned dose. Built for the spreadsheet refugees.
Quick, optional check-ins for mood, reactions, and pain — first-class, never nagging. Log it if you want to; skip it without a guilt trip.
Cusp is a personal tracking tool, not medical advice. It does not diagnose, treat, or tell you what dose to take, and its medication-level estimates are illustrations, not clinical figures. Retatrutide and similar compounds are not FDA-approved — talk to a qualified healthcare provider about your treatment.
Your estimated level and the full curve, with history — no paywall on the part you check every day.
Local-first, with private iCloud sync. No third-party analytics or ad SDKs in the app — ever.
Vial mg plus BAC water plus your dose, turned into the units to draw. The math you used to do by hand.
Doses used, doses left, and your own discard threshold. Know exactly what's on hand.
Cost per vial, per mg, per dose, and your runway. The economics of DIY, made plain.
Switch phones without losing a thing. Backing up your data is free and always will be.
