Drop Curve

Calculate the chance of obtaining repeated target drops with soft pity and hard pity. Compare the configured system against a constant base chance, then export every draw as CSV.

Uses dynamic programming rather than random simulation. Shows median, 90% and 99% thresholds within the chosen horizon.

One target type, one possible drop per draw, pity resets on success. No inventory collection, rate-up or duplicate-exclusion model. Limits: 1,000 draws, 10 copies and 6 million state updates.

The browser demo uses a built-in example. The download includes the full offline tool, source files and instructions. Open index.html in current Chrome or Edge; no installation or account required.