Sport has a shape. Can you draw it?
You say you know ball. Draw it. Ballometry puts your sports knowledge on the chart, from breakout seasons and dynasties to the dips nobody saw coming.
A different way to test your sports knowledge
You do not choose an answer from a list. You draw a line. Use the visible part of a chart to judge what happened next, or fill the missing years in the middle. The reveal connects your prediction with the real results and a short sporting story.
Ballometry is free to play in a modern browser on a phone, tablet or computer. You can draw with a mouse or touch, or enter values using keyboard controls. Read the full rules and scoring guide.
Where the sports stats come from
Every chart uses a checked historical snapshot. Sources, revisions, licences and calculation notes travel with each question. The daily pack uses:
- OpenFootball contributors: Premier League match results, adapted into season points, under CC0 1.0.
- FiveThirtyEight: historical NBA, NFL and MLB game data, adapted into regular-season wins, under CC BY 4.0. NBA source credits Basketball-Reference; NFL/MLB snapshots use a checksum-verified historical mirror.
- F1DB contributors / Marcel Overdijk: Formula 1 race results, adapted into annual wins and podiums, under CC BY 4.0.
- Cricsheet / Stephen Rushe: IPL ball-by-ball JSON, adapted into batting runs. Contains information from Cricsheet made available under the Open Data Commons Attribution Licence 1.0. Original licence notice.
- Wikipedia contributors: pinned historical medal tables, rugby and ice hockey finals, and golf winning scores. Numeric extracts and retained table evidence are adapted under CC BY-SA 4.0, with attribution and share-alike. Team medals count once; sport groupings, selected years and any source corrections are documented per question.
Downloads include future answers: the complete derived question pack, every contributing Wikipedia page, revision and source row, and core source files and checksums. The stated data licences apply to the respective numeric extracts; the application code and original editorial writing are separate.
The original preview remains available through saved scorecards. It credits OpenFootball, the Las Vegas Aces, F1DB, WTA and World Athletics; those official-site factual snapshots are not represented as open-licensed daily-pack data. The men’s 100m preview uses the corrected 1988 result. Tokyo 2020 is labelled by its edition year, even though it took place in 2021.
Ballometry is an independent game. These organisations do not sponsor or endorse it. Individual answers and source details appear after each reveal.
Five sports today. A different lineup tomorrow.
The launch calendar runs from 1 to 10 November 2026, changing at midnight UTC. Everyone gets the same five sports for a date, drawn from 25 categories. Each sport appears twice across these ten editions. Two reserve editions are prepared but have no release date; a countdown appears only for a bundled, scheduled edition.
Your local profile shows streaks and category averages. Saved first scores remain in browser storage for those statistics and backups. Practice has its own save. Export a backup to move progress to another browser; clearing browser data loses it without a backup. Accounts and automatic sync are not available yet.