Terms & disclaimer

Last updated 7 October 2026

Unofficial fan app

Edison Companion is an independent fan project. It is not affiliated with, endorsed by or sponsored by Konami. Yu-Gi-Oh! and its cards, names, artwork, text and trademarks belong to Konami Digital Entertainment, Inc. and its licensors. They are shown in the app for identification and reference only.

Prices and data are estimates

Prices, exchange rates, banlist information and card data come from public third-party sources (see Sources & credits). They can be out of date, incomplete or wrong. Prices are not quotes and are not financial advice. Check the store before you buy, and check the current rules before you play in an event.

Screenshot recognition

Deck import is automatic and can make mistakes. Always review the result. You are responsible for the decks you build and register.

Your data and backups

Your collection and decks are stored on your phone (and copied to your account, if you create one). If you lose the phone, uninstall the app or delete your data, they are gone unless you have made a backup. Please back up regularly.

Accounts and sync

An account is optional. Keep your password to yourself; you are responsible for what happens under your account. Sync copies your data between your devices, which means a deletion on one device reaches the others. It is a convenience, not a backup, so keep making backups of anything you cannot afford to lose. You can delete your account at any time (see the privacy policy). We may close accounts that are used to abuse the service.

Third-party websites and links

The app links to websites we do not control. We are not responsible for their content, prices or practices. Some links may be affiliate links, and the app says so when they are.

No warranty

The app is provided “as is”, without warranties of any kind. To the extent the law allows, the developer is not liable for any loss arising from using the app, including loss of data, or purchases or decisions based on information shown in it.

Changes and contact

These terms may change; the date above shows the latest version. Questions: support@edisoncompanion.com.