Using the app
ECHO VAULT is free to play. It works offline and has no accounts, so there is nothing to sign up for.
Legal
NoxOrigin: Echo Vault terms of use
The short version: ECHO VAULT is free to play, ads are optional, and the only paid option removes ads.
Effective: 18 October 2026
Optional ads
The app can show rewarded videos. You choose whether to watch one. Ads never appear over the game board, and no gameplay advantage is sold.
Optional purchase
The Signal Pass is a one-time $2.99 purchase that removes ads. It is sold and processed by Google Play. Refunds, family sharing and regional pricing are governed by the Google Play Terms of Service.
Your data
Your progress and settings are stored on your device. The privacy policy explains what is stored and what the Google components in the app may collect.
The app as it is
The app is provided as it is, without any promise that it will suit every device or purpose. Use it at your own risk.
Changes
We may update these terms. The date at the top of this page shows when they last changed.
Questions
Use the contact page for anything not covered here.