Select an echo and tap "Get Echo" to start simulating
No sign-up. Just watch a short 15-second ad to unlock, as often as you like.
Echo Farming Guide
An echo in Wuthering Waves has one main stat and up to five substats. Substats are drawn evenly from 13 types and their values are rolled across eight possible steps, so an echo with exactly the substats you want rarely shows up.
Get a feel for the grind without spending a single upgrade material.
Scores run from 0 to 100 and map onto six ranks, S+ down to D. They are based on per-character weighting and how well the main stat and harmony set match — see the "Scoring Method" page for the full explanation.
The equal 7.6923% selection chance across all 13 substat types comes from the official probability disclosure published by Kuro Games. The eight value steps, the main stat pools per cost, and each stat's minimum and maximum are set from values observable in game.
No. This is a simulation built on a probability model, not a reproduction of the game's actual rolls. It is an unofficial fan tool, so game updates can introduce discrepancies. Treat it as a way to gauge the grind, not as a guarantee.
Neither. Every feature is free and requires no account. That includes bonus time and additional save slots — there are no fees and no conditions attached.