NewLaunch offer: 50% off for life with code SHARP50. Claim it
Football halftime calls · Basketball opening-line calls · Basketball halftime leans
Books post a new second-half line in about fifteen minutes, mostly off what just happened. HalfSharp reads every game at the half, every slate before kickoff, and timestamps every play before it starts. The wins and the losses go on the board.
Record since Oct 15, 2026 under the current method, losses included1. Backtest figures are hypothetical2.
What you get
We only call a bet where the numbers held up on seasons our models never saw. Each product keeps its own record, so one never props up another.
NFL & college football
At the half, the book posts a new 2nd-half line in minutes. Our model calls the spots where it overreacts, mostly college football blowouts where the 2nd-half number stays too high. You get an EARLY alert when the first line looks good and the official call about 4 minutes in.
College football model: 61–74% on seasons it never saw. About 1–3 calls a week.
NBA & college basketball
The moment DraftKings opens a line, our model checks it. When the opener is off, you get an alert to bet it before the market moves toward our number. Called within a point of the opener, with the time and price recorded.
At the opener in testing: college spreads 55.7%, college totals 57.5%, NBA totals 58.5%. About 15–25 calls a week in season.
NBA & college basketball
The strongest basketball halftime spots, with what buying points is worth at your book's price. They've hit 51–52% in the past, short of the 53.5% you need at −115, so we label them LEAN and keep them off the bet record.
Their own record, graded in public. If it beats break-even over a real sample, they move up.
Every call graded at the final, one record per product. Halftime calls are timestamped at the half; opening-line calls at the moment they're made. Leans are listed separately and never counted as bets. Oct 15–17 halftime calls are replayed and tagged; live calls start Oct 19.
Updating… · Units sized by call: BET 5, deep dive best bet 3, others 13 ·
Four stages, and each one leaves something you can check.
Every team carries a rating that moves after every game, from the result and from how the market priced it. This is the live top of each league right now.
A model can't see that the starting quarterback was ruled out an hour ago. Every play is checked against injury reports, starting QBs and stadium wind before it shows up. This week's report:
Loading this week's injury and weather report…
Best bets lock Friday at 6 PM ET for football, after final injury reports. The lock time is public. The pick stays hidden until kickoff, then goes on the board with that timestamp.
HalfSharp · Best betWhen the game ends, the play grades itself from the final score at the price it was posted. Nobody edits it, and losses stay up.
The 2nd-half line fills in from live odds. You get bet or pass in plain English, with the record behind the call.
NFL and NBA props priced against recent form and the opponent's defense.
Best bets come only from rules that held up on seasons they were never built on. Two a league at most; often zero.
Log a play in one tap. It grades itself at the final and follows you to any device.
Built from each member's own logged bets and graded by the app. Individual results, not typical, and early samples swing.
Founding members · 50% off for life
Use code SHARP50 at checkout and pay half price, $24.50 a month, for as long as you stay a member. Cancel anytime online.
Not ready yet?
Get updates and the occasional free pick by email. Unsubscribe anytime.
Three kinds of calls, each on its own public record. Halftime calls for the NFL and college football, made when the book overreacts to the 1st half. Opening-line calls for the NBA and college basketball, made the moment DraftKings opens a line our model disagrees with. And basketball halftime leans, labeled LEAN and never counted as bets. Plus a daily deep dive with one best bet every morning, a buy points calculator on every call, phone alerts and the live halftime board.
Every call is timestamped when it's made (at the half, at the opener, or before kickoff) and grades itself automatically from the final score at the price posted. Losses stay on the board and nothing is edited or removed. Each product keeps its own record, so one never props up another. See every result on the Results page.
You shouldn't trust any short record on its own, ours included. That's why every call is graded in public, losses included, and why we also track the closing line: if our number keeps beating the market's final number, the edge is real long before wins and losses settle. The methods themselves were tested on about 51,800 past games, on seasons the models never saw.
Yes, and every call has a calculator for it. Buying points makes you win more often, but each win pays less, so it's only worth it when the book charges less than the points are worth. Tap a bought line, type your book's price, and the app says worth it or not.
Halftime: an EARLY alert within about a minute of the half when the first line looks good, then the official call about 4 minutes in, with a countdown of the time left in the break. Opening lines: the moment the call is made. Deep dive: every morning around 9:30–9:45 AM ET.
Founding members pay $24.50 a month with code SHARP50 (50% off $49) for as long as they stay. Cancel anytime in the app under Settings › Manage billing, with no phone call, and keep access through the period you paid for.
No. Even a real edge loses often: a 58% bet loses 42% of the time. Bet a fixed small amount per call and judge results over months. 21+ only, where betting is legal. Gambling problem? Call or text 1-800-GAMBLER.
No. We're an analytics and information service. We don't accept wagers and aren't affiliated with any sportsbook.
Loading game…