Web app · Sports
Linevigil
Where the books and Kalshi disagree — watch the gap
Log tonight's sportsbook moneyline, Kalshi's cents and your own read on each game, and Linevigil computes the implied edge per side, charts the path the line took, and explains the fourteen movement patterns. No bets, no book integration, no money — a discipline journal. Free.
Stored in your browser only. Nothing you do in the web version is sent to our servers. Clear your browser data and it's gone — so export a backup from the in-app menu if you want to keep it.
In your browser
What you can do in Linevigil on the web
The gap, computed per game
Enter the book's moneyline and Kalshi's last trade and Linevigil converts both to implied cents, shows the spread between them, and highlights anything at or beyond your tradable threshold.
Three prices on one bar
A signature gap bar puts the book's implied probability, Kalshi's cents and your own perceived probability on the same 0–100 scale, with the divergence shaded green or red.
Your edge, both ways
Your probability minus Kalshi's cents is the edge on the yes; your probability minus the book's implied is the edge against the book — plus the fair moneyline your own read implies.
Movement journal with the charted path
Log each line move as it happens — opened −110, −125 by tipoff — flag which pattern you think it is, and both the Kalshi and book-implied paths are charted into the game.
Fourteen line-movement patterns
Reverse line movement, steam, air ball, key-number resistance, buyback, weather and injury moves, lookahead and letdown spots, primetime fade, the Kalshi-versus-book gap, limit moves, totals divergence and the CLV check — searchable, with flag counts from your own journal.
A journal, and only a journal
No sportsbook or exchange integration, no order entry, no automated trading, no real money. Every entry stays in this browser and exports as JSON or CSV.
Screens
Every screen, rebuilt for the browser
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1
Watchlist
The widest gap on the board, the tradable count, a sport filter, and every game as a card with its three prices on the gap bar.
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2
Game
One game's gap, the arithmetic behind it, the charted path of both prices and the movement journal.
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3
Patterns
The fourteen line-movement patterns with what each one signals, searchable, tapped open to read in full.
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4
Moves
Every logged move grouped by game, with the opener-to-latest step and the Kalshi path charted.
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5
Settings
The promises, journal totals, the tradable-spread threshold, JSON and CSV export, sample data and erase.
Try it with sample data: Loads six games across the NBA, NFL, MLB, NHL and college basketball with book and Kalshi prices already diverging, plus thirteen logged line moves — a reverse line move, a steam play, an injury repricing and an air ball — flagged against the pattern library. You can start fresh at any time.
Ready? It's free.
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Questions
Is the web version of Linevigil free?+
Yes. Sign in with a free All Things AI account and use every screen — no subscription, no in-app purchases.
Where is my data stored?+
Only in this browser's local storage. Nothing you enter is sent to our servers, so we can't see it, back it up, or restore it. Clearing site data, a private window, or another device starts empty. Export a backup from the in-app menu to keep it.
Do I need an account?+
You can read about the app without one, but you must sign in to open it. Sign-in is free and takes a few seconds with Google.
How is the web version different from the Linevigil iPhone app?+
Linevigil never connects to a sportsbook or to Kalshi, on the phone or on the web: you type both prices in, which is exactly why it needs no account. It places no bets, has no order entry and touches no money — the journal is the product. The gap still carries the book's vig because no de-vigging is applied, the same as the iPhone app. Treat it as a signal, not a settled price.