About this app
What Linevigil does
Linevigil is a watchlist for the gap between sportsbook lines (DraftKings, FanDuel, BetMGM, Caesars) and prediction-market odds (Kalshi). When the two move in opposite directions, that gap is the only edge retail traders have. Linevigil surfaces it. What's in v1: — Game watchlist: tonight's NBA/NFL/MLB games. Per game, you log: sportsbook moneyline, Kalshi implied probability, your own perceived true probability. Linevigil computes the implied edge per side. — Movement journal: tap a game to log each line movement (book opened −110, moved to −125 by tipoff). Linevigil charts the path. — Library: 14 hand-written line-movement patterns ('public reverse', 'sharp move', 'steam play', 'air ball') with what each one signals. Drawn from public sports-betting reference materials. — No automated trading. No book integration. No real money. Linevigil is a journal. Free.
Features
Built to be useful, not noisy.
Game watchlist
Per-game book vs Kalshi vs your own.
Movement journal
Log line moves over time.
Pattern library
14 line-movement patterns explained.
Why it exists
The problem
Per Trade Ideas Apr 2026: 87-90% of Kalshi volume is sports; Robinhood drives >50% of Kalshi notional. Sportsbooks vs Kalshi pricing diverge constantly. Most retail bettors don't track the gap.
What's different
How Linevigil stands out
Linevigil is the only iOS app whose surface IS the sportsbook-vs-Kalshi spread. Not a sportsbook (no real bets). Not Kalshi (no order entry). It's the discipline journal across both.
You might also like
All apps →
Kitchen
Sports
Pickleball score in one tap
Harvest Log
Sports
The hunting notebook for the stand.
Wakelog
Sports
Logbook for every trip you cast off.
PantryRx
Healthcare
Pantry-first nutrition care, with an outcome guarantee.
GhostFrame
Photo And Video
Photo-a-day, perfectly stacked
Form Coach
Health And Fitness
Live form coach in your pocket
FAQ
Questions about Linevigil
How much does Linevigil cost?▾
Linevigil is free. All features are included from day one — no subscription, no in-app purchases, no paid tiers. Everything you see in this listing works the moment you install it.
Where does Linevigil store my data?▾
On your device. Linevigil is built privacy-first: no account is required, no analytics SDKs, no third-party trackers. Nothing is uploaded to a server we control — the app works without one.
What platforms does Linevigil support?▾
iOS, on iPhone and iPad. You can find the latest availability on this page.
How do I get support for Linevigil?▾
Use the Support link on this page, or email support@allthingsn.com. We answer every message and keep responses on the same thread.
The story
Meet Linevigil — Where the books and Kalshi disagree. Watch the gap
Read the full write-up · 3 min →
More in Sports