Free real-time odds sites help with line shopping by putting book prices side...

https://lunasuniqueinsight.inkharbory.com/posts/free-bet-tracking-app-that-also-shows-odds-comparison

Free real-time odds sites help with line shopping by putting book prices side by side. Check that each quote is for the same market, period, player, and bet type. Odds can move, so verify the price and wager details on your bet slip before you submit.