Club, called
A deterministic engine ranks the candidates; on-device AI picks one and tells you why.
Precise yardages
Front, center, and back of the green — and distance to the pin — updating as you walk.
A proper card
Gross, net, and Stableford — with handicap strokes and a live leaderboard.
Group rounds
Share a round with your fourball over iCloud and follow the card together, live.
The three pillars

Tradition, built on open technology.

Birdo stands on three things that belong to you — your phone's own intelligence, the world's open map of golf, and the position under your feet.

I.

On-device AI

The caddie thinks on your iPhone using Apple's Foundation Models — a free, offline language model. Nothing about your round ever leaves the device.

Foundation Models · iOS 26
II.

Open course data

Course geometry comes from OpenStreetMap — greens, tees, fairways, and hazards mapped by the community and free forever. Coverage only gets better.

OpenStreetMap · Overpass
III.

Live positioning

Core Location places you on the hole and keeps front, center, and back-of-green yardages true with every step you take toward the flag.

Core Location · GPS
Private by design

Your round is nobody's business but yours.

Birdo was built the way a club ought to be run — discreetly. The caddie runs entirely on your iPhone. There is no account to make, no round uploaded to a server, no profile sold to anyone.

Open data in, intelligence on the device, nothing out. It's the rare modern app that works better the less it knows about the wider world.

  • On-device intelligenceThe AI caddie never sends your shots to the cloud.
  • No account requiredTee off without signing up for anything.
  • Works offlineCache a course and play it with no signal at all.
  • Your group, your iCloudShared rounds sync privately through your own Apple account.
Common questions
Not yet — Birdo is in active development and coming to iPhone. The course-data pipeline, the caddie engine, and the scoring logic are built; the app is being assembled around them. There's no public sign-up to collect your details in the meantime.
No. Pull the course before you play and it's cached on the phone. Yardages come from GPS, which needs no cellular connection, and the caddie runs on-device — so Birdo works through the deadest dead zone.
Birdo targets iOS 26. The AI caddie uses Apple's on-device Foundation Models, which need an Apple Intelligence-capable device. On other devices Birdo falls back to its deterministic caddie engine — you still get a sound club recommendation, just without the written explanation.
From OpenStreetMap's open golf schema, queried through the Overpass API and normalized into Birdo's course models. It's free, community-maintained data — and because tools like FairwayMapper write back to the same map, coverage improves over time.
Entirely. The caddie runs on your device, there's no account, and nothing about your round is uploaded. Group rounds sync through your own iCloud account between the people you invite — see the Privacy Policy for the details.
Coming soon

A caddie for the player who respects the game.

Birdo is coming to iPhone — iOS 26 · iPhone & Apple Watch to follow.

Explore the features