Every dose, walk, weigh-in and vet visit for your pets — and calm guidance at 2am, when the question is whether this can wait until morning.
Free to download · Premium starts with a three-day free trial · iPhone
The household
Coming up
Merged in the order they fall due, across the pets in your household. Reminders repeat daily through yearly, so a monthly flea treatment gets set up once.
Weight
28.4 kg
−1.7 kg, seven weigh-ins
The kind of slow change a vet asks about and nobody can answer from memory.
Before you open the app
Home Screen, Lock Screen, Control Centre and the Dynamic Island. See all seven.
Up next
Apoquel
Milo
in 14 hrs
A day, kept
Two screens from the app itself — not mockups.
Bella’s log
8:00 AM
The household opens on what’s next — Milo’s Apoquel at eight, Bella’s booster on the twentieth. Nothing to search for, nothing to remember.
All day
Walk, meal, water, pee, poop, med, weigh-in. Pee and poop are separate entries, because “went out” is not what the vet asks.
2:00 AM
Ask at any hour, or show it the lump. It answers plainly, says when it doesn’t know, and tells you to call a vet when that is the answer.
How it works
Every image below is a region of the two screens above, at full resolution.
Species, breed, age and weight, plus the notes you’d otherwise keep in your head. Two pets or five — the household is the unit, not the pet. Everyone who feeds them can share it, so the log is the same log wherever it’s written.
Doses, vaccines and appointments for each pet you add, merged into one list in the order they fall due. Nothing to search for, and nothing to remember. Reminders repeat daily through yearly, so a monthly flea treatment gets set up once.
Eleven kinds of entry, timestamped, with a note when it matters. Pee and poop are separate entries, because “went out” is not what the vet asks. The same four taps live on the Home Screen widget, so most days you never open the app at all.
Every weigh-in on one chart. 30.1 kg in April, 28.4 kg now — a 1.7 kg drift across seven weigh-ins that no single entry would have shown you. This is the kind of change a vet asks about and nobody can answer from memory.
One file with the log, the reminders and the weight history in it. You stop reconstructing six months of care at the counter from memory.
Five tabs and two shortcuts. Chats is the 2am guidance; Alerts is everything due. The stethoscope finds a clinic that’s open now.
Free to download, for iPhone.
Everything that’s in it
Every one of them shipped. Nothing here is a roadmap item.
What it is, and what it isn’t
Ostler sits between you and the 2am search you would otherwise do alone. It is careful about the difference between guidance and medicine, and it says so out loud.
Ostler gives general pet-care guidance. It does not diagnose illness or prescribe treatment, and it will tell you so rather than guess.
Anything that reads as urgent gets an answer that starts with “call a vet now” — before any explanation, not after it.
Your pets’ records are yours. Nothing is sold, and the AI is told what it may and may not keep.