Stop paying full price for your bets.
Pro watches every game on Kalshi, Polymarket, Novig and ProphetX and tells you the moment one is selling a team below the sportsbooks' fair price. Try it free for 7 days; cancel before the trial ends and you're never charged.
See what you get
Chapters →- Kalshi vs sportsbook odds for every game
- Where the money is: Kalshi volume and moves
- Cappers leaderboard and graded records
- Combo checker and betting calculators
- Trend builder: last 3 seasons
- Weekly recap email
- Instant alerts when a price drops below fair: push + email
- Every gap on the board: moneylines, spreads, totals, player props
- Cheapest of Kalshi, Polymarket, Novig and ProphetX on every game
- Arbitrage and big-money alerts
- Pick of the Day, Trap and Safest Favorite in every sport
- Cappers' open picks before the game starts
- Trade tracker with Kalshi auto-import and beat-the-close stats
- Stake sizing, every season of trend history
$0 today · we remind you 2 days before it ends · cancel anytime in a few taps
The math: buying a 54% chance at 47¢ instead of 54¢ saves 7¢ a contract. On a $50 bet that's about $7 of value, more than half a month of Pro, on one game.
See graded results →Free vs Pro
| Free | Pro | |
|---|---|---|
| Kalshi, Polymarket and sportsbook prices | ✓ | ✓ |
| Where the money is (Kalshi volume) | ✓ | ✓ |
| Cappers' graded records | ✓ | ✓ |
| Which team is underpriced, and by how much | — | ✓ |
| Push and email alerts the moment a gap opens | — | ✓ |
| Spreads, totals and player-prop gaps | — | ✓ |
| Arbitrage across exchanges | — | ✓ |
| Big-money alerts | — | ✓ |
| Pick of the Day, Trap, Safest Favorite | Past results | Before the games |
| Cappers' open picks | After kickoff | Right away |
| Trade tracker + Kalshi auto-import | — | ✓ |
| Trend history | 3 seasons | Every season |
Questions
What exactly is a price gap?+
The sportsbooks' odds, with their built-in cut removed, say a team wins (say) 54% of the time. If Kalshi, Polymarket, Novig or ProphetX sells that team for 47¢ after fees, you're buying a 54% chance for 47%. Over many bets, buying below fair is how you come out ahead.
How fast are alerts?+
We check every price every 5 minutes and alert you once per game side, only for the sports, teams and gap size you choose. Gaps often close within minutes, so alerts are the point.
Do you guarantee wins?+
No. A 5-point edge still loses plenty of single games. Every pick and gap we publish is graded in public, losses included, on our results page.
Does it work in the iPhone app?+
Yes. Subscribe here, then sign in to the app with the same email. Alerts arrive as notifications.
Can I cancel?+
Anytime, from your account page, in two clicks. Cancel during the 7-day trial and you're never charged.
Where can I use Kalshi and the other exchanges?+
They're available in most US states, with some exceptions that change over time. Check each exchange's site for your state. You must be 18+ or 21+ depending on the exchange and state.
New to the terms? A is a game where an exchange sells a team for less than its fair chance, after fees.
Spot Angle sells data, tools and alerts, not guaranteed winners. Nothing here is betting or financial advice. 21+. If gambling stops being fun, call 1-800-GAMBLER.