Birdia product page (in beta) · reviewed 12 Oct 2026
Birdia (our product, in beta) starts from what your ball does. In "What is your ball doing?" you pick slice and it ranks the most likely causes from its cited doctrine (over the top, weak grip, inside takeaway, alignment, steep plane, flying elbow and reverse pivot), each with its drill. Then you film your swing with your phone, no sensors, to see which body move fits.
What Birdia does for this
"What is your ball doing?": pick slice (or hook, push, pull, short, high, fat, thin, heel, toe, chip or putt) and see its likely causes in order, each with its encyclopedia entry and drill.
Film your swing face-on or down the line with your phone camera. Pose is computed on the phone itself, and the video stays there unless you share it.
What the camera measures today: tempo (backswing/downswing), sway face-on and early extension down the line. The other slice causes are shown as a "likely cause according to the doctrine", never as a measurement.
To review the swing: skeleton overlay, hand-path trace, address guide lines, slow motion and frame by frame.
Chat with the coach about each swing, plus a weekly plan built from your goal and your real faults, with a daily focus in "Today".
Birdia doesn't measure it with the camera: it suggests it as a likely cause according to the doctrine
What it looks like
Down-the-line: from the top, the hands and club move outward (toward the ball line) before dropping; the club crosses the plane and attacks out-to-in.
What it does to the ball
Out-to-in path: a pull if the face matches the path and a slice if it stays open to it (the curve is set by the face-to-path difference); divots pointing left.
How to fix it
Let the hands drop straight down to start the downswing while the hips rotate: the club must come down inside the path it went up on
Sources
David Leadbetter — The Golf Swing · TrackMan A/S — TrackMan Averages & Ball Flight Laws · Adam Young — The Practice Manual
Place a headcover 5 cm outside and 10 cm behind the ball. Hit balls without touching it: if you come over the top, you'll strike it before the ball. Start with an 8-iron at 60% and raise the intensity gradually.
Birdia does not measure clubface or club path: that takes a launch monitor such as TrackMan. With a single camera, over the top or a weak grip are suggested as likely causes from your ball flight and the doctrine, not measured. And if the app can't see your body with enough confidence, it would rather not give you a fault.
The web app runs at golf.birdia.app. The Android and iPhone apps are in beta: sign up and we send you an invite.
Frequently asked questions
Can an app tell me why I slice?
It can get you very close. Under TrackMan's ball flight laws, a slice happens when the face arrives open to the club path. Birdia starts from that flight and ranks the swing causes that usually produce it (over the top, weak grip, inside takeaway…), each with its source. What a phone camera can't measure is face angle at impact in degrees: that takes a launch monitor.
Which drill should I use to stop slicing?
It depends on the cause. For over the top, "The outside guardian" (a headcover outside and behind the ball) punishes an out-to-in downswing; for a weak grip, "The knuckle mirror"; for an inside takeaway, the one-piece takeaway with an alignment stick. Work on one cause at a time, starting with the most likely.
Do I need sensors or a launch monitor to use Birdia?
No. Birdia only uses your phone camera, on Android, on iPhone or in the browser (golf.birdia.app). A launch monitor would give you face and path in degrees; Birdia gives you the likely cause and the drill from your ball flight and what the camera sees.
How much does Birdia cost?
There is a free plan. Premium costs €14.99/month or €99/year and Pro-IA €29.99/month, VAT included. Payment happens only inside the app, through the App Store or Google Play. Birdia is in beta.