Prove You
Know Ball
Draft your all-time roster, sim the season, and climb the leaderboard across five sports — NBA, NFL, Premier League, NHL & MLB. Download free on iOS, or play instantly in your browser.
Eight ways to prove it
Every rating is grounded in real career production — no opinions, no filler. One bad pick and the run is on you. That’s the whole point.
Solo
Build all-time teams and climb the global leaderboard.
Daily Challenge
Keep your streak alive. Everyone gets the same spin — one shot to top the board.
The Slate
Draft a fresh NFL squad every week and score real live fantasy points.
Head-to-Head
Challenge a friend by BallerTag and let the sim settle it.
Leagues
Run a private season with your group chat, all five sports.
Trivia
Prove your deep-cut knowledge era by era.
Arcade
Fast sports mini-games between drafts.
Build-A-GOAT
Assemble the greatest player ever, attribute by attribute.
Spin. Draft. Dominate.
Players who know ball
4.8 out of 5 from 19 ratings. Straight from the App Store, unedited.
Surprisingly tough in a good way
“The draft challenges are addictive, the interface is clean, and it’s surprisingly tough in a good way. It really makes you think about history, players, teams, and eras instead of just guessing.”
Insanely close to perfect
“This app is insanely close to perfect.”
Wannaknoballlll?!?!
“This app has made me realize how little I actually kno ball. So much fun to play and I learn a lot as I go.”
Free to play. Pro to dominate.
Start free — no account required. Go Pro when you want unlimited runs and every mode. Cancel anytime.
- Play free in your browser or on iOS
- No credit card required
- Daily Challenge across all 5 sports
- Global leaderboards + your profile
- Head-to-Head & Trivia
- Unlimited ranked runs — no daily cap
- Every mode unlocked, all 5 sports
- Stats Vault + full career dashboard
- Pro identity: gold name, crest & colors
- 7-day free trial, cancel anytime
One subscription covers all 5 sports and every mode — no packs or per-sport unlocks to buy.
iKnoBall Pro is an auto-renewing subscription — $2.99/month or $19.99/year. Payment is charged to your Apple ID at confirmation of purchase and renews automatically unless auto-renew is turned off at least 24 hours before the period ends. Manage or cancel anytime in your App Store settings.
Questions, answered
Is iKnoBall free?
Yes. iKnoBall is free to play on iPhone and in your browser, with no account needed to start. iKnoBall Pro is optional: $19.99/year or $2.99/month, with a 7-day free trial.
How are player ratings calculated?
Every rating comes from real career production — per-game output, efficiency and peak seasons — scaled so players from different eras can be compared on the same curve. The season sim only uses your five starters, so every pick matters.
What if my favorite player is missing?
Tell us. Player pools keep growing with updates, and suggestions from players go straight onto the list — email therealethanself@gmail.com with who is missing and for which team and era.
Which sports can I play?
Five: NBA, NFL, Premier League, NHL and MLB. Each sport has its own all-time player pool, Daily Challenge and leaderboards.
What is The Slate?
The Slate is a weekly NFL mode: you draft a fresh squad of current players each week and score real, live fantasy points against everyone else.
Can I play against my friends?
Yes. Challenge a friend head-to-head on the same draft, or start a private League and run a full season with your group chat.
How do I cancel iKnoBall Pro?
On iPhone, go to Settings › your name › Subscriptions › iKnoBall and turn off auto-renew. Web subscribers can cancel from Manage subscription in the app. You keep Pro until the end of the period you paid for.
“Everyone says they know ball. I built iKnoBall to make you prove it — no free picks, no easy mode, just you and what you actually know across all five sports.”