Atrium

Atrium is an open-source Android controller for servers that users already run. It lets users connect to their own machines and manage a connected stack from an Android phone without a middleman account. It is intended for people who operate media, download, monitoring, or server-management services and want one local control point.

Atrium supports Sonarr, Radarr, Lidarr, Prowlarr, Bazarr, Seerr, Tautulli, Tracearr, qBittorrent, Deluge, Transmission, rTorrent, SABnzbd, and NZBGet for the library, request, indexer, subtitle, activity, transfer, and queue functions provided by those services. It also connects to Jellyfin, Emby, and Plex for library browsing, item details, resume rows, and now-playing sessions, but it does not stream video. Glances, Beszel, dashdot, Speedtest Tracker, and Unraid provide host, network, array, disk, container, and virtual-machine information within the areas supported by each service.

Multiple profiles allow one phone to hold more than one server stack, and each instance can store both a local URL and an external URL, selecting the appropriate address for the current network. A reorderable dashboard provides widgets for active downloads, current streams, upcoming releases, recent additions, recent downloads, requests, and server information. Profile import and export, Material 3 Expressive styling, dynamic color, custom palettes, light and dark themes, and an optional biometric lock cover configuration and access preferences.

Atrium has no analytics, telemetry, advertising, or account requirement, and it does not report information back to its developers. Credentials are kept in encrypted storage on the Android device. As a Download-category entry, MirrorNest mirrors the official Android build directly on its own storage and scans it for malware before publishing, giving users a catalog distribution point for the open-source application.