Beta 1.4 is out. Setup is now a single question. Join on TestFlight and run Theatrium on your Apple TV in minutes.
A modern home-theatre lounge, its two light groups shifting colour to match what's on the Apple TV
The Theatrium Glass dashboard with live markets, rain radar, an activity ring and a beach webcam, the room lights a soft, muted white Theatrium Estate dashboard on the TV, the room lights a soft, muted white Theatrium Line Ribbons visualiser: soft violet and green ribbons drifting across the screen, the room lights flowing to match Theatrium Glass dashboard on the TV, the room lights a soft, muted white Theatrium Neon Grid visualiser: a red horizon grid receding into the dark, the room lights glowing to match Theatrium Boardroom dashboard with a meeting-room availability board and live markets on the TV, the room lights a soft, muted white Theatrium on an Apple TV with no home server: weather, rain radar, a live webcam and a Bitcoin price card, the room lights a soft, muted white Theatrium dashboard with a large live camera feed and a weather radar card, emerald theme, the room lights a soft, muted white Theatrium dashboard with the new Activity card showing steps, distance and floors with a goal ring, the room lights a soft, muted white Theatrium Fractal Spiral visualiser in amber and rose, the room lights glowing warm to match Theatrium Kaleidoscope visualiser: warm symmetrical petals radiating from the centre, the room lights glowing to match Theatrium iPod visualiser: the original click-wheel iPod floating with the album on its screen, the room lights glowing to match Theatrium Mirrorball visualiser: a hyper-real disco ball scattering coloured light, the room lights glowing to match Theatrium Compact Disc visualiser: a 3D iridescent CD spinning, the room lights glowing to match Theatrium Mixtape visualiser: a clear cassette with a handwritten label and spinning reels, the room lights glowing to match Theatrium settings on the TV, the room lights a soft, muted white The Theatrium wordmark - home dashboard, music visualiser, lighting sync
Apple TV

Scroll · your room lights follow what's on screen

Apple TV appBeta 1.4

Home Dashboard Music Visualiser Lighting Synchronisation

A new Apple TV app for multisensory smart-home integration: your Home Assistant or HomeKit dashboard, a tempo-synced visualiser, and room-light sync, working as one.

Join the beta on TestFlight See what it does ›

Works with Home Assistant, Apple HomeKit, or no smart home at all · no account, no analytics, no tracking

On the screen, and beyond it

Run your home. Feel your music. Move the light.

The Theatrium dashboard on an Apple TV

The dashboard

A beautiful, curated dashboard: every room, scene, camera, sensor and control on one calm, elegant screen, from Home Assistant or Apple HomeKit, built for the Siri Remote.

The Theatrium real-time music visualiser

The visualiser

Most music visualisers just replay video loops. Theatrium generates every scene in real time on the Apple TV, from flowing abstract fields to hand-crafted retro showpieces like a spinning Compact Disc, a click-wheel iPod and a hyper-real Mirrorball, drawing on the track's tempo, album art and title, and reshuffling each play, so the same song never looks the same twice.

See all 29 scenes →
A lounge with its LED lights synced to the on-screen scene

The light sync

Two light groups shift colour with the song, following its tempo, so the whole room moves with the music. Works on Home Assistant, Apple Home or Hue.

Three ways in

Home Assistant, Apple HomeKit, or just an Apple TV.

Run Theatrium on a full Home Assistant server, straight off Apple HomeKit with no server at all, or with no smart home whatsoever. It reads whatever's playing, then drives the visualiser and your lights to the track's tempo.

Works locally with Home Assistant

With a home server

Every entity you've set up, plus the extras only a server gives: history sparklines, who's-home, weather, system metrics, and media from any connected speaker.

Works with Apple Home

No server needed

Point Theatrium straight at your Apple Home: lights, climate, cameras, locks, covers, sensors and scenes. Bring the music and visualiser with Apple Music, Spotify or Last.fm.

No smart home at all? Apple TV‑only mode still gives you the full ambient screen: weather and rain radar from your location, live webcams, markets, crypto, news, a calendar and the clock, plus the visualiser and your music. Zero setup.

Main lights THEATRIUM Theatrium on Apple TV Accent lamps Smart speaker or any media player Home Assistant Now playing Main Accent Apple Music Main Accent
  1. 1Your musicYour speaker is playing something. Home Assistant knows what it is.
  2. 2TheatriumReads the track and its tempo, draws the scene on your TV, and pulls two colours out of what it is drawing.
  3. 3Your roomThe two colours go back out through your server to the overheads and the lamps.

Your speaker plays, Home Assistant reports it, and Theatrium turns it into a scene and two room colours.

The light sync

Home lighting synchronisation

Two colours, read live from the screen: Main for your overheads, Accent for your lamps. One Apple TV can light the whole house.

Now playing

Colour from the album art

The cover’s dominant swatch becomes Main; a contrasting swatch becomes Accent.

Main#3D6BE6
Accent#E8479E
In the room
Visualiser

Colour from the scene

The scene’s prevailing hue becomes Main; a highlight becomes Accent.

A Theatrium visualiser scene of flowing ribbons in magenta, teal and green
On screen
Main#43D8C5
Accent#A5419F
In the room
Before you start

What you need

Hardware

Any Apple TV 4K, 1st generation (2017) onwards. The non-4K Apple TV HD is not supported. Requires tvOS 18.0 or later.

A data source

Home Assistant or Apple Home. Theatrium finds a Home Assistant server on your network and fills the address in, then you sign in by scanning a code on your phone, so there is no access token to create. A built-in Demo mode lets you explore the whole app with neither.

Lights

Smart lights already set up in Home Assistant or HomeKit. For optimal light-sync effects, we recommend creating a Main and an Accent group, or set, of lights.

Music

The visualiser and light sync follow whatever’s playing: Apple Music on this Apple TV, or Spotify, Last.fm and Plex mirrored from your phone or computer. On Home Assistant, any media_player source works too, including Music Assistant.

Plays with Apple Music Spotify Last.fm Plex

Theatrium displays the rooms, accessories and media you have already configured; it does not set up Home Assistant, HomeKit or your lights for you. Your Apple TV and your data source must be on the same local network. Theatrium is an independent app and is not affiliated with or endorsed by Apple, the Open Home Foundation, Spotify or Last.fm.

New in the beta

The latest in Theatrium.

Every update brings the dashboard, your music and the room a little closer together. Here’s what just landed, and everything before it.

Theatrium setup asking a single question: Demo, Home Assistant, Apple Home, or Apple TV only

One question, then you’re in

Setup used to ask about your lights, your music and your cards before showing you anything. Now it asks one thing, where your home data comes from, and drops you straight onto a working dashboard. Everything else is waiting in Settings when you want it.

Theatrium’s Home Assistant sign-in: an address found on the network, or a QR code to sign in from your phone

It finds your server

Theatrium looks for Home Assistant on your network and fills the address in for you. From there, sign in on the TV with a token, or scan the code and approve it on your phone, on your own Home Assistant page, with no token to create at all.

The Theatrium Pro screen showing extra themes, extra visualisers and specialist cards for a one-time purchase

Theatrium Pro

Theatrium is free, and the free tier fills a whole dashboard on any backend, every music source included. Pro is one purchase, once, for every theme, the full visualiser catalogue, the specialist cards and the richer light-sync modes. No subscription.

Every release
Theatrium setup asking a single question: Demo, Home Assistant, Apple Home, or Apple TV only
Theatrium’s Home Assistant sign-in with the address found automatically and a QR code for signing in by phone
The Theatrium Pro screen: extra themes, extra visualisers and specialist cards for one purchase
Theatrium’s visualiser settings listing every scene with a live preview beside the list
Theatrium’s new Mirrorball visualiser: a hyper-real disco ball scattering coloured light beams across the screen
Theatrium’s new Compact Disc visualiser: a 3D iridescent CD spinning with a handwritten label
Theatrium’s new iPod visualiser: the original click-wheel iPod with the album playing on its screen
Theatrium’s new Mixtape visualiser: a clear cassette with a handwritten label and reels that spin to the track
Theatrium’s new Activity card showing steps, distance and floors with a goal ring on the dashboard
Theatrium’s new guided onboarding with a live dashboard preview and three setup steps
Theatrium in Apple TV only mode: weather, rain radar, a live webcam and a Bitcoin price card, no home server needed
Theatrium music settings: Apple Music, Spotify, Last.fm and Plex sources
Theatrium Light Sync settings with Main and Accent light groups and intensity
Theatrium’s redesigned now-playing card, the album cover angled on a reflection
Theatrium Boardroom dashboard with a meeting-room availability board and live markets
Theatrium Estate dashboard on an Apple TV
Theatrium Glass dashboard on an Apple TV
Theatrium Bento dashboard with a live webcam and weather radar
Theatrium music visualiser: soft violet and green ribbons drifting across the screen
Beta 1.4
  • Setup is one question. Choose where your home data comes from and you’re on a working dashboard, with everything else in Settings
  • Theatrium finds your Home Assistant server on the network and fills in the address
  • Sign in from your phone by scanning a code, approved on your own Home Assistant page, with no access token to create
  • Theatrium Pro. One purchase, once, for every theme, the full visualiser catalogue, the specialist cards and the richer light‑sync modes. The free tier still fills a whole dashboard
  • Every music source is free: Apple Music, Spotify, Last.fm and Plex
  • Apple Home now waits for your accessories to load before showing the dashboard, instead of filling in around you
  • Switching between Home Assistant and Apple Home works properly, and each Apple TV keeps its own choice
  • iCloud settings sync is now off unless you turn it on, in Settings → Connection
  • A sample now‑playing card on Apple Home and Apple‑TV‑only setups, so the dashboard looks right before you connect music
  • Fixed a crash when choosing Apple Music, and dozens of layout fixes at the Large display size
Beta 1.3
  • A retro visualiser collection: Compact Disc, iPod, Mixtape and Mirrorball, built live from your album art and tempo
  • Activity card. Steps, distance and floors from your iPhone, with a daily goal ring
  • Live card previews everywhere. Every card’s setup shows the real card with real data before you place it
  • News card. Rotating headlines with article photos, from a curated list of image-rich sources
  • Climate card. Choose an elegant 24-hour temperature plot or the mode controls
  • A guided new setup. Pick your backend, music and cards, with a live preview
  • Apple TV‑only mode. No Home Assistant or HomeKit needed: weather, rain radar, a live webcam, markets, crypto, a calendar and the clock, plus your music
  • Weather and the rain radar now find your location automatically, with nothing to set up
  • A crypto card. Choose from a dozen coins, one per card if you like
  • Party mode. One tap speeds the visuals to the track’s tempo and cycles your room lights through party colours
  • Larger, clearer visualiser controls and readouts
  • Start Fresh. Reset your setup and re-run onboarding from Settings
Beta 1.2
  • Redesigned now-playing card, consistent across every music source
  • Smoother, quicker room-light colour transitions
  • Your settings now follow you between Apple TVs, over iCloud
  • Refined, more consistent card styling throughout
  • Plex & Plexamp. Mirror what’s playing on your server
Beta 1.1
  • Four dashboard themes: Glass, Bento, Estate and Boardroom
  • Home Assistant, Apple Home (HomeKit) and Philips Hue, plus a demo mode to explore with no setup
  • A card for everything at home: lights, climate, cameras, sensors, scenes, weather and energy
  • A GPU music visualiser with dozens of scenes, tempo-synced to what’s playing
  • Gentle, slow room-light sync. Two light groups ease toward the on-screen colours
THEATRIUM®
Theatrium app icon Apple TV · Beta 1.4 · free to install
Join the beta on TestFlight Join the community · r/TheatriumApp

Support, feedback and feature ideas live on r/TheatriumApp · or write to hello@theatrium.info