Curve is a kind, careful journal for the people taking care of a diabetic cat — and for the cats they love. Built by someone who got tired of watching a Google Sheet crash mid-curve.
The whole shape of a chronic condition, in one timeline.
Curve started as a fix for a real frustration: every diabetic-cat app either crashed or didn't quite trust the people using it. So we made a softer one.
Daily
Blood glucose & insulin
Pre-shot and random BG, dose history with reasons, gentle morning and evening reminders.
Sessions
12-hour glucose curves
Seven readings, two hours apart, with notifications between. Auto nadir, peak, duration.
Sharing
Vet-ready PDF
One page, any range, with chart, in-range %, adherence, and full dose-change log.
Beyond
CKD · OA · pancreatitis
IRIS staging from SDMA / creatinine, OA injection tracking, pancreatitis meds — one cat, many conditions.
Database
Foods that matter
Carbs and phosphorus for common diabetic and renal foods. Scan a barcode for anything outside.
Yours
Private by design
Local SwiftData. Optional iCloud sync through your own account. No analytics, no trackers, no sign-up.
Curve is not a medical device. It doesn't tell you what to inject, when to inject, or whether to inject. It doesn't diagnose. It doesn't fire hypoglycemia alarms. Your cat is your vet's patient — Curve is the notebook.
Inside Curve
Five screens, one quiet shape.
Every screen carries the same wave — your data, drawn the same way, from the morning log to the vet handoff. Drag to browse.
Today. Three taps and the day is logged. Pre-shot BG, insulin, meal — done.Curve session. Seven readings, two hours apart. Smart reminders so you don't miss one.Trends. Pre-shot average, in-range %, adherence — the numbers your vet asks about.Vet PDF. One clean page. Any range. Every dose change with the reason you gave it.The moment. When a curve finishes, the day's shape gets a beat of its own.
Signature
A wave that runs through everything.
The app is called Curve. The thing you're looking at all day is a curve. So we drew one — and put it in every moment that matters. Same Bezier, eight different homes.
Today greeting
A sparkline drawn from your cat's last 24 hours of readings. Not decoration — your data, every morning.
Chart marker
92NADIR
Pre-shot, nadir, peak — serif numbers right on the curve, with a tiny wave underneath each one.
Loading
Generic iOS spinner, retired. A dashed wave flows wherever the app is waiting on something.
Section divider
Card groups don't get a flat 1px line. They get the same wave, in miniature.
The moment
You did the curve. That's worth seeing.
A 12-hour at-home glucose curve is real work. Seven readings, two hours apart, around your job and the laundry. When you finish, Curve doesn't drop you into a metrics screen — it gives you a beat. Your cat's name in serif. The actual shape of the day, drawn as a single brand stroke. Four numbers. Then the summary.
No interpretation. No "well-regulated." No "consider X units." Just the curve you made, the way you made it.
✓ Curve complete
Bert's curve.
7 readings · 12h 4m
142
Pre-shot
92
Nadir
152
Peak
124
Mean
View summary →
Pricing
Free for the parts that matter.
Logging blood glucose, insulin, and basic events is free forever — you shouldn't have to pay to care for someone you love. Pro is the polish around that core.
Yearly
$19.99
per year · Family Sharing
14-day free trial
Lifetime
$39.99
once · Family Sharing
No renewals. Pays for itself after two years.
Subscriptions auto-renew unless cancelled at least 24 hours before the period ends.
Manage anytime in Settings → Apple ID → Subscriptions.
See Terms and Privacy.
Ready when you are.
Download Curve, or reach out if you have a question first — a real person reads every message.
