Keep track of walks, meals, meds and vet visits.
free to download · one premium plan covers up to 5 people at home · three days free · 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
31 lb
+1.0 lb, ten 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.
Nishka’s log
8:00 AM
Home opens on your pets and what each has had today, with what’s due next underneath. Nothing to search for, nothing to remember.
All day
Walk, meal, treat, 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.
ostler lays the day out in the order it happens, so the next thing to do is always at the top. tap once to log it.
How it works
Every image below is cut from the app itself, at full resolution.
Species, breed, age and weight, plus the notes you’d otherwise keep in your head. With Premium, add every pet in the house and bring the whole household in on one subscription, up to five people, so it’s 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.
The entries that fit the animal, from hay to water tests: twelve for a dog, sixteen for a horse. Each is timestamped, with a note when it matters, and a dog’s 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 lb in January, 31 lb now, and the dips in between across ten weigh-ins — a pattern 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. Part of Premium.
Five tabs and two shortcuts. Chats is the 2am guidance; Reminders is everything due. The stethoscope finds a clinic that’s open now.
Free to download, for iPhone.
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. Guidance chat is part of Premium. Finding a vet is free on every plan.
How often should I brush my dog’s teeth?
Daily brushing is the ideal target for dogs. It’s most effective at controlling plaque and tartar buildup.
If daily isn’t realistic for your routine, aim for at least 3–4 times a week.
This is general guidance, not a diagnosis. Contact your vet if you’re concerned.
My dog ate chocolate
This may be an emergency
Based on what you described, your pet should be seen by a veterinarian right away.
Find an emergency vet near me
Pet ID cards
Your pets sit in a stack, like the cards in Wallet. Tap one and everything about that pet is right underneath it.
Each card carries the pet’s photo, breed, age, weight and next reminder. Hold one to reorder them.
Log, chat, reminders and the profile, with what the pet has had today. Choose the card’s colour from eight, or any shade on the slider.
The next reminder, the last vet visit, the last weigh-in and your notes. Share the front as a picture with a sitter.
log a walk in one tap: in the app, from a home screen widget or from control centre. the week adds itself up.
Everything that’s in it
Every one of them shipped. Nothing here is a roadmap item.
one app holds the routine, the records, the family and the vet. everything you log feeds the rest.
Log a walk and the family hears about it. Ask a question and the answer knows the log.
Make it yours
Every change shows across the app the moment you pick it, and nothing is kept until you save. Tap a colour below to see the app, and this page, in it.
Try the colours
Green
Every animal, its own log
Pick the pet and the log offers what that animal actually needs: sixteen kinds of entry for a horse, nine for a fish tank, and the same twelve a dog has always had.
In that animal’s logFeedWhat it’s called thereScroll sideways for every animal
| Entry | Dog12 entries | Cat10 entries | Horse16 entriesNew | Pig14 entriesNew | Goat15 entriesNew | Sheep15 entriesNew | FishTank9 entriesNew | FishPond9 entriesNew | Bird10 entries | Rabbit11 entries |
|---|---|---|---|---|---|---|---|---|---|---|
| Food and water | ||||||||||
| Meal | Yes | Yes | Feed | Yes | Grain | Grain | Feeding | Feeding | Yes | Yes |
| Hay | No | No | Yes | No | Yes | Yes | No | No | No | Yes |
| Water | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Yes | Yes |
| Treat | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Yes | Yes |
| Minerals | No | No | No | No | Yes | Yes | No | No | No | No |
| Milking | No | No | No | No | Yes | No | No | No | No | No |
| Water quality | ||||||||||
| Water test | No | No | No | No | No | No | Yes | Yes | No | No |
| Temp | No | No | No | No | No | No | Yes | Yes | No | No |
| Water change | No | No | No | No | No | No | Yes | Yes | No | No |
| Filter | No | No | No | No | No | No | Yes | Filter & pump | No | No |
| Out and about | ||||||||||
| Walk | Yes | No | No | Yes | No | No | No | No | No | No |
| Turnout | No | No | Yes | No | Pasture | Pasture | No | No | No | No |
| Ride | No | No | Yes | No | No | No | No | No | No | No |
| Play | Yes | Yes | No | Enrichment | No | No | No | No | Out of cage | Exercise |
| Bathroom and cleaning | ||||||||||
| Pee | Yes | No | No | No | No | No | No | No | No | No |
| Poop | Yes | No | Manure | No | No | No | No | No | No | No |
| Litter | No | Yes | No | No | No | No | No | No | No | Yes |
| Bedding | No | No | No | Yes | Yes | Yes | Tank cleaned | Pond cleaned | Cage | No |
| Care | ||||||||||
| Grooming | Yes | Yes | Yes | No | No | No | No | No | Nails & wings | Yes |
| Hooves | No | No | Yes | No | No | No | No | No | No | No |
| Farrier | No | No | Yes | No | No | No | No | No | No | No |
| Hoof trim | No | No | No | Yes | Yes | Yes | No | No | No | No |
| Shearing | No | No | No | No | No | Yes | No | No | No | No |
| Skin care | No | No | No | Yes | No | No | No | No | No | No |
| Dental | No | No | Dentist | Tusks | No | No | No | No | No | No |
| Health and records | ||||||||||
| FAMACHA | No | No | No | No | Yes | Yes | No | No | No | No |
| Deworm | No | No | Yes | Yes | Yes | Yes | No | No | No | No |
| Med | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Weight | Yes | Yes | Yes | Yes | Yes | Yes | No | No | Yes | Yes |
| Vet | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Note | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Turn any entry on or off for one pet: walks for the cat that goes out on a harness, manure off for the horse at a boarding barn. Everyone in the household sees the same list.
Fish get feeding, water tests, temperature and water changes. A tank adds its cleaning and the filter; a pond adds its cleaning, the filter and the pump.
Every entry has its word in both, and follows your iPhone’s language. A household with one phone in each still keeps one log.
Find a vet
Tap the stethoscope and Ostler lists the clinics near you, with their hours and directions. Finding a vet is always free, on every plan.
Find a vet
Open · closes 6:00 PM
WebsiteMaps
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.
facts about the app itself, taken from its code.
kinds of animal, each with its own log
kinds of entry for a horse, hay included
languages, english and español
dosages from the assistant. that is your vet’s call
to find a vet, on every plan
free covers one pet. premium covers the whole household: up to 5 people on one subscription, starting with three days free.
Two pets need Premium. Yearly works out to about $6.67 a month.
billed through the app storePremium isn’t one person’s. Whoever subscribes shares a code, and up to four more people join on their own iPhone with their own sign-in. Each of them gets every pet, guidance chat and the PDF reports. Nobody pays twice.
the monthly allowance is the household’s: 100 messages and 30 photo assessments shared, not each. everyone’s chats stay their own. if the subscription ends, the whole household goes back to the free plan together.
Free to download, for iPhone.