Know your risk before you play.

Enter your real win rate — pulled straight from your own session history, by stakes — and PokerFolio simulates thousands of possible outcomes from there. See your risk of ruin, your chance of finishing up over a given stretch, and a realistic spread of ending bankrolls, not just the average.
A losing week or month doesn't necessarily mean you're playing worse. Variance shows you the range of results a winning player can expect to run through even when nothing about their game has changed — so a downswing reads as normal variance instead of a reason to panic.