Sandbag Golf vs BaySpeed

Struggling with your swing? Get connected to a PGA professional in seconds for a live lesson over a video call (like Zoom but tailored for golf instruction) — no scheduling, no waiting, no back-and-forth messaging. Get help whenever you need it. It is like having a pro in your pocket. Just open the app, tap “Find an available Pro,” and connect with a golf instructor within seconds for real-time coaching. Whether you’re trying to fix something on the driving range before a round, work through swing issues at home, or get help during practice, Sandbag makes professional instruction instantly accessible. Features include: -- Live video lessons with PGA teaching professionals -- Instant, on-demand coaching -- No scheduling required -- Vetted instructors with ratings and reviews from golfers -- Telestration - instructors can pause, rewind, slo-mo, and draw on the screen, live -- Lesson recordings and feedback summaries -- Pay only for the time you use — no need to commit to a full 30- or 60-minute lesson -- Get real golf instruction exactly when you need it. Note that Sandbag Golf is only in English

BaySpeed turns your Topgolf bay into a ball-flight lab. Topgolf shows you where the ball landed. BaySpeed reveals how fast it was going when it left your club, how high it flew, and how much of that distance was carry vs roll — all reverse-engineered from your existing game history through a physics simulation calibrated against Toptracer data. Sign in with your Topgolf account and import your full history in seconds. Every shot gets analyzed: ball speed in mph, launch angle, descent angle, carry vs roll breakdown, kinetic energy, and impact force. WHAT YOU GET FREE — Sign in with Topgolf and import your full game history — Your 3 most recent sessions, fully analyzed — Tap-to-inspect trajectory replays color-coded by speed — Speed distribution chart for every session — Per-shot impact physics: ball speed, launch angle, force, kinetic energy — Sample data mode if you want to explore before signing in UNLOCK PRO (one-time purchase, no subscription) — Full session history, not just your 3 most recent — Personal records across speed, distance, energy, impact force, and session score — Improvement trajectory — track your gains to the mph per session — Recent form vs prior — see if you're hot right now — Momentum — acceleration phase and current improvement streak — Milestones — the first time you crossed 70, 80, 90, 100, 110 mph — Forecast — when you'll hit each speed tier if your pace holds — Total energy delivered — kilojoules of kinetic energy across every shot — Speed percentiles — p50, p75, p90, p95, p99 — Shareable stat cards for any section HOW THE PHYSICS WORK BaySpeed runs a Newtonian trajectory simulation with quadratic drag, Magnus lift, and spin decay, then binary-searches for the ball speed that produces the measured Topgolf yardage given your bay floor height. The drag coefficient is speed-dependent and calibrated against Toptracer ground truth. Speeds are estimates (±10-15%) — not the same as a launch monitor, but a lot more interesting than just yardage. PRIVACY Your credentials go directly to Topgolf's servers — BaySpeed never sees your password. Game data is cached locally on your device. No ads, no third-party tracking, no analytics SDKs. NOT AFFILIATED WITH TOPGOLF BaySpeed is an independent third-party app that uses your Topgolf account to access your own game data. Topgolf is a registered trademark of its respective owner. BaySpeed is not affiliated with, sponsored by, or endorsed by Topgolf.