Help Center

From getting started to methodology — find your answer here.

• Getting started

  How to start with BallSpeed — guest mode, accounts, age verification and adding to your home screen.

• How to record the perfect video

  Slow-motion steps on iPhone, Samsung, Pixel and Xiaomi; angle, tripod and lighting tips.

• Marking the ball & calibration

  Mark the ball in the first frame and set the scale (automatic ball-diameter or manual distance).

• Understanding your result

  The confidence score, warnings, speed leagues and the difference between km/h and mph.

• Accuracy & methodology

  Why BallSpeed is a relative measurement, the fps-vs-error relationship, consistency criteria and synthetic test results.

• How on-device analysis works

  Why analysis runs on your phone, when it falls back to the server, and offline use.

• Troubleshooting

  Fixes for common issues — ball not found, low confidence, video won't read, and slow analysis.

• Badges & leaderboards

  How you earn badges and how the weekly/monthly/all-time leaderboards work.

• Friends, challenges & teams

  Adding friends, "beat me" challenges and joining teams.

• Setting up a team for coaches

  How coaches create a team, manage members, keep teams private and handle child accounts.

• Account, data & privacy

  Child accounts, parental consent, exporting your data and deleting your account.

• Community & reporting

  How to report inappropriate content and how the profanity/name filter works.

• Contact

  Email addresses for support, partnerships, press and abuse reports.