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ES-DE vs RomM: catalog facts
ES-DE	RomM
Freemium Free on desktop. The Android version is a paid purchase.	Free The open-source software is available without a license fee. Hosting is separate.
Windows, macOS, Linux, Android	Web, Self-hosted
Systems come preconfigured, so setup is mostly pointing it at your ROM folders Built-in scraper fetches artwork, videos and metadata	Web library with metadata, artwork and in-browser play Save synchronisation across devices through the server
The Android version is a paid purchase Theme configuration has a learning curve	Docker deployment and a database to maintain In-browser emulation performance is limited compared with native emulators
Downloadable app	Self-hosted, Web application
Open source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.