Photone - Grow Light Meter

1.5.4

Lightray Innovation GmbH

4.58

10,727 reviews

500,000+
Downloads

Free

Turn your device into an accurate light meter — for plants (PAR/PPFD/DLI) & more

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About Photone - Grow Light Meter

Photone - Grow Light Meter is a tools app developed by Lightray Innovation GmbH.

Download Statistics

Photone - Grow Light Meter has been downloaded 580 thousand times. In the last 30 days, the app was downloaded 11 thousand times. It is ranked #147 in tools.

User Ratings

Photone - Grow Light Meter is rated 4.58 out of 5 stars. The rating is based on 11 thousand ratings.

App Information

Photone - Grow Light Meter is FREE to download. The APK download size is 87.17 MB. The latest version available is 1.5.4. The last update was on September 10, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play July 2021.

Description

Take the guesswork out of plant lighting with Photone, the most accurate plant light meter app.

More data about Photone - Grow Light Meter

Price	Free to download
Total downloads	580 thousand
Recent downloads	11 thousand
Rating	4.58 based on 11 thousand ratings
Ranking	Medium ranked
Version	1.5.4
APK size	87.2 MB
Number of libraries	19
Suitable for	Everyone
Ads	NO ads

App Performance Report

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Alternative downloads for the Photone - Grow Light Meter app

Photone - Grow Light Meter compared with similar apps

Common keywords of similar apps

Photone Diffuser Par Grow Accurate Free Https Dli Camera Maps Calibration Devices Guides Purchase Default Quality Full Candles Color Temperature Kelvin Meters Model Ads Required Led Require Options Standard Als Unlocks Planet Light App Meter Measurements Device Ppfd Plant Accuracy Features Plants Measure Lux Sensor Foot Time Apps

Keywords missing from this app

Intensity Exposure Lighting Brightness Measurement Measuring Level Pro Maximum Illuminance Support Levels Home Indoor Simple Values Growth Information Easy Room Fc Minimum Work Tool Recent Photography Shows Average Candle Helps Office Screen Results Professional

Google Play Rating history and histogram

Rating history

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8.5K

1.4K

210

640

Downloads over time

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Photone - Grow Light Meter has been downloaded 580 thousand times. Over the past 30 days, it averaged 380 downloads per day.

Changelog of Photone - Grow Light Meter

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Developer information for Lightray Innovation GmbH

Lightray Innovation GmbH

contact@growlightmeter.com

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Comments on Photone - Grow Light Meter for Android

★★★★★ Ryan LaHaie · Jan 16, 2026

⭐️⭐️⭐️⭐️⭐️ "The Best Investment for My Growth Professional Accuracy Without the $500 Price Tag! "I’ve been using the Photon app for a while with the 'paper diffuser' method, but I finally upgraded to the official Diffuser & Cosine Corrector accessory and the difference is night and day.

★★★★★ Tristan Knight · Sep 4, 2026

I love this app, and I always recommend its use with other indoor hobby horticulturalists. For a fraction of the price which one might pay for a professional PPFD meter you can very effectively dial in your light intensity, smooth out canopy hot spots and check DLI all with a suitable smart device. Well done Photon

★★★★★ Miratopa · Jun 19, 2026

Very useful and accurate. I love it, thank you! To be able to create a PPFD Heat map is very useful. Better than just a PAR meter.

★☆☆☆☆ Silent Camper · Jul 14, 2026

All features now require payment, I've had this app since the start and even got a new phone to use it on. Now they paywall all the LED features like they did on IPhone. At this point may as well use an old phone and sideload and older version. Edit to reply to photon: Pay for something that was already free before? Hell no, I would rather go buy a real PPD meter at that point. I used to recommend many people get this app but not something I will do anymore. it's always a bait n switch.

★☆☆☆☆ Omar Robles · Aug 6, 2026

It only lets you check natural light and incandescent bulbs when 99 percent of homes have LED lights. This app sucks.

★☆☆☆☆ Elaine Thompson · Jun 24, 2026

The app says it's not calibrated for my S26 and may be inaccurate. The solution: calibrate with a photometer I trust. If I had a photometer I trusted, why would I be using my phone? It also falsely detects a diffuser, even though the app says not to use one. I'm hoping they get the S26 resolved but until then I'm uninstalling. It's impossible to know what I'm actually measuring.

Google Play Rankings for Photone - Grow Light Meter

Top rankings

Rank	Country	Category	List
147	Germany	Tools	Top Grossing

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Ranking history in Germany

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Technologies used by Photone - Grow Light Meter

11 permissions · 19 libraries

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