About This Site
Echo Simulator is an unofficial fan tool that lets you simulate Wuthering Waves echo farming for free.
Last updated: July 27, 2026
Who Runs This
This is an unofficial fan tool built and maintained by an individual. It has no affiliation with Kuro Games or its subsidiaries, and it is not licensed, supervised, or endorsed by them. Please use the contact form to get in touch. Bug reports and corrections to the data are reviewed and addressed where possible.
Why This Exists
Echo farming in Wuthering Waves runs on a double lottery: the substat type is drawn evenly from 13 options, and then its value is rolled across eight possible steps. That structure makes it very hard for a player to judge how many more echoes they need before the one they want appears, and it is common to burn a large amount of materials only to come up short. This tool exists so you can get a feel for those odds before spending anything, and so the reasoning behind every score is published rather than hidden.
Where the Data Comes From
The equal 7.6923% selection chance across all 13 substat types comes from the official probability disclosure published by Kuro Games. The eight-step value ranges and the main stat pools and draw weights per cost are set from values observable in game. The recommended harmony sets, main stats, and substat priorities for each character are evaluation data compiled independently by this site.
How It Is Maintained
Data is updated as new characters, echoes, and harmony sets are released. Changes are listed on the news page. Because this is an unofficial tool, discrepancies can appear right after a game update. If you spot one, please let me know through the contact form.
Using the Site
Every feature is free and requires no account. There are no charges and no conditions attached to unlocking anything. Simulation results and Farming Supporter records are stored only in your own browser via localStorage; nothing is sent to a server. Clearing your browser data also clears those records.
Disclaimer
This tool is a simulation built on a probability model. It does not reproduce or guarantee the game's actual roll results. The scores and ranks it displays are guidance based on evaluation criteria defined by this site. While care is taken to keep the content accurate, its completeness is not guaranteed, and no liability is accepted for any loss arising from use of this site. All in-game names, images, and data remain the property of their respective rights holders, including Kuro Games.