Yes. Game predictions (spreads, moneylines, player props, totals), matchup splits, simulated ranges of outcomes, team and player pages, news, and standings are all free with no login required. A free account additionally unlocks a personal pick tracker. A paid Supporter tier ($6.99-$9.99/mo) adds CSV data export, unlimited multi-game parlay generation, and community features.
The model is backtested against every completed game already in the database, using only the information it would have actually had before kickoff -- not hindsight. Current accuracy numbers and a full calibration breakdown are published on the Methodology page and updated as more games are played.
Automatically, every 6 hours -- new rosters, injuries, and box scores are ingested and every prediction is recomputed on that cadence.
NFL and NCAA (college) football.
Yes -- real, live market odds from multiple real sportsbooks, shown side by side and graded against the model's own predicted probability: green means better value than the model expects, red means worse. It is comparison data, not a ranked "best odds" tool.
No. spreadsim is not a sportsbook affiliate, does not rank books by "best odds," and is not compensated based on where or whether a user places a bet. Odds are shown purely for comparison against the model's own numbers.
A rating system built from historical team and player performance, adjusted for real matchup-level splits, feeding a Monte Carlo simulation that runs thousands of correlated simulated outcomes per game -- producing a full range of likely results, not just a single guessed score. Full detail is on the Methodology page.
No. Everything on spreadsim is for informational and entertainment purposes only, not gambling advice. If gambling is a problem, call or text 1-800-MY-RESET.