Guides and free tools

How to get useful video of your tennis, what to expect when an AI watches it, and free tools for practice and match days.

• Free toolServe speed calculatorMeasure how fast your serve is from any phone video. Mark contact and the bounce, tap where it landed on the court, and get your speed in mph and km/h with an honest error range. Free, in your browser.
• Free toolMatch stats trackerTrack your first and second serve percentage, double faults, winners and unforced errors during a match. Tap after each point; free, no account, works on your phone.
• Free toolDrill interval timerA work and rest interval timer for tennis drills and on-court fitness, with beeps at every change. Presets for footwork, serve baskets and sprints. Free, in your browser.
• GuideHow to film your tennisWhere to put your phone, which angle to use, what frame rate and clip length work best, and the mistakes that make tennis video useless for analysis. A practical setup guide.
• GuideWhat AI analysis can seeAn honest look at AI tennis coaching from phone video: what it reads well, what it gets wrong (forehand vs backhand, spin), and how to use the feedback without overhauling your game.
• ComparisonSwingVision alternativeSwingVision is Apple-only. If you're on Android, or want a written coaching report from clips you already have, here's how Baseline compares, including where SwingVision is the better pick.