Comparison

Light Master vs Home Assistant

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Light Master

This app transforms your device into a professional light meter. Measure illumination, CCT, UV, and XY values by simply plugging in a compatible accessory. It's a handy tool for analyzing light conditions.

Highlights
  • Measures illumination
  • Measures CCT
  • Measures UV
  • Measures XY values
  • Requires accessory connection
Features
Read full description

Opple light master is a smart luxmeter. Plug the light master into the earphone jack, and open the app to use it. Illumination and CCT, UV and XY can be measured in light master.

About

Home Assistant

Control your entire smart home from one app, locally and privately. Automate devices, receive notifications, and manage your home's data securely. Integrates with thousands of smart devices and open standards.

Highlights
  • Control entire home from one app
  • Discover and configure new devices
  • Automate device actions
  • Local data privacy
  • Connect to open standards (Z-Wave, Zigbee, Matter)
  • Remote access via Home Assistant Cloud
  • Location-based automation
Features
Read full description

The Home Assistant Companion app allows you to access your Home Assistant instance on the go. Home Assistant is the smart home solution focused on privacy, choice, and sustainability. It runs locally in your home via a device like the Home Assistant Green or Raspberry Pi. This app connects to all the most powerful features of Home Assistant, - One app to control the whole home - Home Assistant is compatible with the biggest brands in the smart home, connecting to thousands of smart devices and services. - Discover automatically and quickly configure new devices - such as Philips Hue, Sonos, and IKEA Tradfri. - Automate everything - Make all the devices in your home work in harmony - have your lights dim when you start watching a movie, or turn off your heat when you’re away from home. - Keep your home’s data in the home - use it privately to see past trends and averages. - Connect to open standards with hardware add-ons - including Z-Wave, Zigbee, Matter, Thread, and Bluetooth. - Connect anywhere - If you would like to access this app while away from home, the most secure and simple way to get started is Home Assistant Cloud. The app unlocks your smartphone or tablet as a home automation tool. - Securely share your location, using it to automate heating, security, and so much more. - Get notifications on what's happening in your home, from detecting leaks to doors left open, you have full control over what it tells you. - Carplay functionality lets you open a garage or disable the security system from the dash of your car. - Build your own widgets to control any device in your home with a tap. - Integrate Home Assistant's functionality into Shortcuts, for example have your phone’s morning alarm turn on the coffee machine. - Apple Watch compatibility can show your home's temperature on a watch face or quickly activate devices. - Text or talk to your local voice assistant on your device. - Mac compatibility allows you to control your home from your desktop, but also to share data to build automation, like having your streaming lights turn on when your camera is active. Join the over 1 million users and empower your home with better privacy, choice and sustainability. Compatible with: Airthings, Amazon Alexa, Amcrest, Apple HomeKit, Apple TV, ASUSWRT, August, Belink WeMo, Bluetooth, Bose SoundTouch, Broadlink, BTHome, deCONZ, Denon, Devolo, DLNA, Ecobee, Ecovacs, Ecowitt, Elgato, EZVIZ, Fritz, Fully Kiosk, GoodWe, Govee, Growatt, Hikvision, Hive, Home Connect, Homematic, HomeWizard, Honeywell, iCloud, IFTTT, IKEA Tradfri, Insteon, Jellyfin, LG Smart TVs, LIFX, Logitech Harmony, Lutron Caseta, Magic Home, Matter, MotionEye, MQTT, MusicCast, Nanoleaf, Netatmo, Nuki, OctoPrint, ONVIF, Opower, Overkiz, OwnTracks, Panasonic Viera, Philips Hue, Pi-hole, Plex, Reolink, Ring, Roborock, Roku, Samsung TVs, Sense, Sensiba, Shelly, SmartThings, SolarEdge, Sonarr, Sonos, Sony Bravia, Spotify, Steam, SwitchBot, Synology, Tado, Tasmota, Tesla Wall, Thread, Tile, TP-Link Smart Home, Tuya, UniFi, UPnP, Verisure, Vizio, Wallbox, WebRTC, WiZ, WLED, Xbox, Xiaomi BLE, Yale, Yeelight, YoLink, Z-Wave, Zigbe

Screenshots

Light Master2 screens
Home Assistant4 screens

Verdict

The call

The clearest difference is review sentiment: Home Assistant at 54% against Light Master's 0%. Home Assistant also leads on device support (4 vs 2). Light Master's advantage is iOS requirement (9.0 vs 16.4). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 10 days. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
Light Master versus Home Assistant: the parameters behind the verdict, then further details
ParameterLight MasterHome Assistant
PriceFreeFree
Rating—4.7 (4K ratings) — better
Positive reviews0.0% of reviews54.1% of reviews — better
Number of ratings—4K — better
Update frequencyEvery 10 daysEvery 10 days
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, Mac, Apple Watch — better
Requires iOS9.0 — better16.4
Further details — not scored
Size32 MB261 MB
Age rating4+4+
DeveloperOpple Lighting Co., Ltd.Nabu Casa, Inc

Customer experience

Light Master

Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

Home Assistant

All ratings3,967 ratings
Positive93.5%
Neutral1.6%
Negative4.9%
Written reviews510 reviews
Positive54.1%
Neutral8.6%
Negative37.3%

In-app purchases

None

Light Master

No in-app purchases

None

Home Assistant

No in-app purchases

Questions

Is Light Master free?
Light Master is free to download, with no in-app purchases.
Is Home Assistant free?
Home Assistant is free to download, with no in-app purchases.
Do Light Master or Home Assistant have ads?
Neither Light Master nor Home Assistant shows ads.
Which is updated more often, Light Master or Home Assistant?
Light Master ships an update every 10 days, and Home Assistant every 10 days. Most recently, Light Master was updated on October 10, 2026 and Home Assistant on October 15, 2026.

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