# BaySpeed — Golf ball speed & shot physics > Golf ball speed & shot physics (iPhone/iPad app by Kevin Tang.) - Source: https://appshunter.io/ios/app/bayspeed/id6777824892 (this page in markdown: same URL + `.md`) - Developer: [Kevin Tang](https://appshunter.io/developer/1780758221) - Category: Sports, Health & Fitness - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17.0 · 3 MB - Languages: American English - Released: 2026-06-23 - Data updated: 2026-09-02 - User reviews in markdown: https://appshunter.io/ios/app/bayspeed/id6777824892/reviews.md ## What is BaySpeed? 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. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | BaySpeed Pro | $6.99 | one-time | ## Version history (last 4 releases) ### 1.0.3 — 2026-07-09 Fixed: games played at Topgolf venues other than your home location now load correctly. BaySpeed now finds and imports your rounds from every venue you've played, not just your home venue. ### 1.0.2 — 2026-07-07 This update fixes game history not appearing for players whose Topgolf account is registered at a different venue than the one they play at. • BaySpeed now automatically checks the venue you last played at, not just your account's home venue • If your games still can't be found, BaySpeed searches every Topgolf location for them (the first import may take a couple of minutes) • Games from several game types that were previously skipped are now imported • Import progress is now shown while your history syncs ### 1.0.1 — 2026-07-06 Fixed an issue where scores wouldn't load if you've played at more than one Topgolf location. BaySpeed now imports and merges your full history across every venue you've played. ### 1.0 — 2026-06-23 No release notes. ## More apps by Kevin Tang - [Wallet Buddy!](https://appshunter.io/ios/app/wallet-buddy/id6738414239) - [Card2Clip](https://appshunter.io/ios/app/card2clip/id6748371125) - [Bet Arbitrage Calculator](https://appshunter.io/ios/app/bet-arbitrage-calculator/id6748549209) - [NATO Translate](https://appshunter.io/ios/app/nato-translate/id6748549979) - [Credit Age Calculator](https://appshunter.io/ios/app/credit-age-calculator/id6748550053) - [DTMF Dialer Tool](https://appshunter.io/ios/app/dtmf-dialer-tool/id6748663059) All apps by Kevin Tang: https://appshunter.io/developer/1780758221 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*