OpenSG
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OpenSG

Every app tells you what happened. OpenSG tells you what to do about it.

OpenSG computes Strokes Gained on every shot — no equipment, just your phone — then shows the Strokes Gained of every aim point, so you can see which target wins before you swing. Stop guessing. Start choosing your miss instead of chasing your best shot.

Try OpenSG free Learn more

Free while we're in beta. Practice stays free; real-round tracking moves to a subscription later.

On any phone — iPhone or Android. No sensors, no hardware.

OpenSG Strokes-Gained breakdown by category on a phone
OpenSG in-round caddy — plays-like distance, suggested club, and live distances, wind and slope on a phone
For players

A caddy in your pocket

  • A "plays-like" distance and a suggested club on every shot — adjusted for slope, wind and altitude.
  • The app logs the round for you — GPS follows your ball; you just confirm at the hole with a tap.
  • See the five places you win and lose strokes — so a hot putter can't hide a cold approach.

Everything you need in a round

Every number you'd want over the ball — plus the tools to plan, practice and compete.

Read the green

Aim line and break for the putt, from crowd-built green contours.

Live weather

Wind and air density folded into every plays-like number.

Your dispersion

Your real shot spread drawn on the hole — not a generic guess.

Expected strokes

The expected score from any spot on the course.

Suggested aim point

The app marks the spot that gains the most strokes — then move it and watch the odds shift, so you never guess your target.

Yardage-book notes

Per-hole notes with aim lines and "don't-hit" markers.

Tournament mode

A Rules-legal view that hides the assistance competition doesn't allow.

Altitude calibration

Tune your whole bag for altitude and temperature before a trip or event.

Range-to-course rounds

Play a real course from the driving range or practice facility.

Plan from the couch

Study and strategize every hole before you tee off.

Skill drills

Putting, approach and in-play drills scored on Strokes Gained.

Visual shot editor

Fix every shot on the map — drag, add or reclub — after each hole or the whole round, with GPS breadcrumbs to recover shots you forgot to log.

Learn how it all works → Read the FAQ
OpenSG coach lineup cockpit — roster ranked by category Strokes Gained with a best-ball lineup optimizer A single player's deep-dive — both handicaps and per-category Strokes-Gained gauges for tee, approach, around the green and putting Assign practice — the roster ranked worst-first on a metric, with a one-tap drill scheduled to each player's phone
For coaches

See your whole team clearly

  • Your whole roster ranked at a glance — form, consistency, and who fits the course you're about to play.
  • A best-lineup optimizer with predicted scores for match day.
For coaches

Find every weak spot

  • Drill into any player for a full per-category breakdown — tee, approach, around the green, putting and penalties.
  • Both handicaps, fairways hit and range sessions in one view, so the leak jumps out at a glance.
For coaches

Assign the right drill

  • Schedule a drill to the players who need it — it lands on their home screen with a one-tap Start.
  • Off-course practice, so it never touches their handicap or Strokes Gained. Runs in any browser.
Request a team pilot →
Built for school golf

Minor-safe by design, with a Rules-legal mode for tournament rounds.

No hardware to buy

Just the phone in your pocket — iPhone or Android.

Every part of your game

Tee to green to putts, benchmarked to the level you choose.

Try OpenSG free today.

Strokes Gained is where OpenSG starts — smarter golf is where it takes you.

Try OpenSG free Log in

Free while we're in beta — we'd love your feedback.