Codex
Tools
Interactive calculators and simulators. All run in your browser — nothing leaves your device.
Live
Gacha Simulator
Pull the launch banner using an estimated rates table (Arknights mainline reference). Persistent pity counter. Pull history strip.
Open
Live
Reroll Budget Calculator
Monte Carlo estimator: pulls, source units and pack count to reach your 6★ target at 50% or 90% confidence. Fully reactive.
Open