Atrium

retransmit | Download

7 Downloads 12 Views v1.5 30.23 MB 4.1+

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(30.23 MB)

Editor's Overview

Atrium is a download application developed by retransmit, packaged as a single Android APK of version 1.5 weighing in at 30.23 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 30.23 MB, so it installs quickly even on modest connections.
This build is signed by "retransmit" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

Atrium is a controller for the servers you already run. Point it at your own
machines and manage the whole stack from your phone, without a middleman
account and without anything phoning home.

It is a controller, not a media player. Atrium browses and manages your media
servers; it does not stream video.

Supported services:

* Sonarr, Radarr and Lidarr - library, queue, wanted, history, blocklist,
system status and the full settings tree
* Prowlarr - indexers, search and grab
* Bazarr - subtitle status, search and download
* Seerr (Overseerr and Jellyseerr) - discover, request and manage requests
* Tautulli - active streams, history, statistics and users
* Tracearr - who is streaming across Plex, Jellyfin and Emby, watch and
library statistics, history, a media catalog and policy incidents
* qBittorrent, Deluge, Transmission and rTorrent - torrent lists, transfers
and per-torrent files, peers and trackers
* SABnzbd and NZBGet - usenet queue control and history
* Jellyfin, Emby and Plex - library browsing, item detail, resume rows and
now-playing sessions
* Glances, Beszel and dashdot - CPU, memory, GPU and disk usage of the host
* Speedtest Tracker - internet speed results and history
* Unraid - array and disk health, per-core system load, Docker containers and
virtual machine control

Features:

* Multiple profiles, so a phone can carry more than one stack
* Every instance holds a local and an external URL, and Atrium picks the right
one for the network you are on
* A dashboard of at-a-glance widgets you can reorder: active downloads, now
streaming, upcoming releases, recently added, recently downloaded, requests
and server info
* Profile import and export
* Material 3 Expressive design with dynamic color, custom palettes, light and
dark themes
* An optional biometric lock

Privacy:

There is no analytics, no telemetry, no advertising and no account. Atrium
never reports anything back to its developers. Credentials are held in
encrypted storage on the device.

Artwork is loaded from your own servers, which cache it, rather than from
sites like TheTVDB or TMDB. There is one exception worth knowing about.
Searching for something to add that your servers have never seen has nothing
cached for it yet, so its poster comes from the artwork site directly, which
then sees your address. Everything else goes only to the servers you
configure.

Free software under the GPL-3.0-or-later.

Details

Version	v1.5
Size	30.23 MB
Developer	retransmit
Category	Download
Package	app.atrium
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	7

Frequently Asked Questions

Is Atrium free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Atrium require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Atrium safe to install?
We link to the exact APK published by retransmit. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Atrium?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install Atrium

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded app.atrium.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Atrium» by retransmit and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.