Photone - Grow Light Meter

1.5.0

Lightray Innovation GmbH

4.65

10,493 reviews

500,000+
Downloads

Free

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

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4.65 · 10,493 reviews · 500,000+ downloads

About Photone - Grow Light Meter

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

How many times has Photone - Grow Light Meter been downloaded?

Photone - Grow Light Meter has been downloaded 560 thousand times. In the last 30 days, the app was downloaded 12 thousand times.

What is the rating of Photone - Grow Light Meter?

Photone - Grow Light Meter is rated 4.65 out of 5 stars, based on 10 thousand ratings.

Is Photone - Grow Light Meter free?

Photone - Grow Light Meter is free to download. The APK download size is 88.35 MB. The latest version available is 1.5.0. The last update was on July 11, 2026.

What are the requirements for Photone - Grow Light Meter?

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	560 thousand
Recent downloads	12 thousand
Rating	4.65 based on 10 thousand ratings
Ranking	Not ranked
Version	1.5.0
APK size	88.3 MB
Number of libraries	20
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 Dli Grow Accurate Free Https Camera Maps Calibration Devices Guides Logging Purchase Default Quality Full Candles Color Temperature Kelvin Meters Daily Integral Toolbox Auto Model Ads Required Led Require Real Options Light App Measurements Meter Device Ppfd Plant Measure Accuracy Features Plants Lux Sensor Foot Time

Keywords missing from this app

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

Google Play Rating history and histogram

Rating history

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8.5K

1.2K

250

460

Downloads over time

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Photone - Grow Light Meter has been downloaded 560 thousand times. Over the past 30 days, it averaged 400 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

★★★★★ Jeremy Haynes · Dec 2, 2025

Tested against an actual meter. Compared to other apps, this is hands down the most accurate to do PPFD measurements. At most depending on one the settings you have there could be roughly 5% difference. So that said, if you can not get the Diffuser accessory or get your hands on Diffuser Paper (matte on one side and glossy on the other) then you will most likely be reading slightly out. Calibrate the app to your phone and set to your type of light for the Best Reading.

★★★★★ Mr. Rosa · Dec 26, 2025

Great app for reading and setting up perfect growing conditions for all types of plants. Definitely use this app on the daily for my growth space & would recommend to all 💯

★★★★★ Brad Hepler · Feb 19, 2026

This app has helped immensely getting the light right for indoor vegetables. Having the ability to adjust hours of exposure to get DLI at various heights helps to switch between various needs (peppers vs lettuce)

★☆☆☆☆ 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.

★☆☆☆☆ 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.

★☆☆☆☆ Jax Koyote · Apr 27, 2026

Booooooooo! Why are you charging so much per yr just to use it to get proper readings, and we have to buy a diffuser. no, thank you.

Google Play Rankings for Photone - Grow Light Meter

This app is not ranked

Technologies used by Photone - Grow Light Meter

12 permissions · 20 libraries

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