When your round goes sideways, we're the 77 crew with your instant fix.
Who built this?
CORE GOLF 77 was designed and built by Coach Sun Bae, who runs the CORE GOLF YouTube channel.
- Graduate of San Diego Golf Academy
- USGTF Certified Professional
- Passed PGA PAT
- Golfsmith Master Craftsman (USA)
- Head Coach at: Victory Golf Academy (Seoul, Korea) NICE PRO AM GOLF (Hanam, Korea)
Why we built it
“An on-course fix that's simple, fast, and easy enough that any golfer can apply it on their next swing.”
YouTube is flooded with golf lessons. But out on the course, you don't have time to A/B test five different tips between shots.
Golf is hard even when you keep it simple. Info overload is the enemy on the course.
More information doesn't make you a better golfer. Knowing the core does.
Whether you're on the course, the range, or a simulator — when something goes wrong, you should be able to figure out the cause in 10 seconds and get a fix in 10 more.
We compressed 20+ years of swing data and in-person coaching reps into this site.
Of course, every golfer is different — flexibility, age, temperament, handicap. But nail the core principles and almost anyone can improve fast. CORE GOLF 77 will prove it.
What makes it different
No app installs. Ever.
No sign-up. No personal info. No bloated downloads. Add the link to your home screen like an app — done.
Stupidly simple
We studied every major golf app and site out there. We trimmed every confusing feature and kept only what works on the course.
Two taps to the answer
Pick from 12 problem categories. Get the cause and the fix in plain text, plus a short video.
Please read before using
Hey golfers, The 77 fixes inside CORE GOLF 77 carry Coach Sun Bae's 20+ years of swing research and on-range coaching — they're the real thing. To keep that content from going in one ear and out the other (and to discourage scraping), we limit you to 5 fixes per day. That cap exists so you actually absorb each fix. The library will keep getting simpler, faster, and up-to-date. We're excited to grow with you from here on.
CORE GOLF 77 aims to stay free and friction-free until every amateur golfer is striping their shots. To help us keep this platform constantly updated and evolving, your 'Buy me a coffee' goes a long way. Thank you for your support.