Photone - Grow Light Meter

Name: Photone - Grow Light Meter
Rating: 4.654362 (10598 reviews)
Author: Lightray Innovation GmbH

By: Lightray Innovation GmbH App

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

Overview

Google Play Store

Downloads

558,327 ▲ 3.96K

Data as of 2026-07-18

Rating:

4.65 ▼ 0.03

(10,598)

Version:

1.4.1

Last updated: 2026-07-11

Ranking

#92,574 ▼ 39

Overall

Features & Capabilities

Photone turns your phone or tablet into an accurate plant light meter, delivering lab-grade measurements for indoor growers. It measures PAR/PPFD, DLI, lux, and color temperature (Kelvin) using your device’s camera, with in-app guides to help interpret results.

To ensure accuracy, diffuser guidance is provided and a diffuser accessory is available; Photone supports LED, HPS, CMH, and other grow lights while remaining ad-free. Optional upgrades (lifetime unlock or Pro subscription) unlock premium features, and the app is ISO/CIE 19476 compliant for reliable results.

User Growth & Download Statistics

App Photography Education Data

By:

Lightray Innovation GmbH

Downloads:

558,327 3.96K

Rating:

4.65

(10,598) 0.03

Version:

1.4.1 Last updated: 2026-07-11

Version code:

5534

Creation date:

2021-07-26

Publisher country:

Permissions:

android.permission.CAMERA Very high risk
com.google.android.gms.permission.AD_ID Moderate risk
android.permission.ACCESS_ADSERVICES_AD_ID Low risk
android.permission.ACCESS_ADSERVICES_ATTRIBUTION Low risk
android.permission.INTERNET Low risk
android.permission.WAKE_LOCK Low risk
com.android.vending.BILLING Low risk
com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE Low risk
android.permission.ACCESS_NETWORK_STATE Safe
android.permission.VIBRATE Safe

Size:

71.82MB

Email:

co*****@growlightmeter.com

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-07-18

Compare stats and ranking:

Ranking

# 92,574 ▼ 39

Other platforms

Photone - Grow Light Meter (v4.5.0)

4.60

(4,873)

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

Lightray Innovation GmbH

Google Play Store

https://play.google.com/store/apps/details?id=io.lightray.photone

Email:

co*****@growlightmeter.com

Website:

https://growlightmeter.com

User Reviews

Photone is a highly praised light meter app for horticulture, offering accurate measurements comparable to expensive hardware. Users appreciate its comprehensive features and developer support. However, consistent accuracy often requires using a diffuser accessory or paper diffuser, and recent updates introduced some issues with forced diffuser use and fluctuating readings. Calibration is necessary for reliable results, but some users find this process complicated. Minor usability issues like missing navigation controls and lack of a par lock feature have been noted. Overall, it is regarded as an effective and affordable tool for growers willing to calibrate and use recommended accessories.

Pros

Provides accurate and comparable light measurements like PPFD, DLI, lumen, and color temperature for horticulture.
Includes useful features such as measurement hold, tilt detector, peak/average values, and options for various light sources.
Affordable alternative to expensive dedicated light meters, suitable for home growers and indoor plant enthusiasts.
Active developer support with quick responses to issues and regular app improvements.
Compatibility with multiple devices and ability to calibrate the app for better accuracy with accessories and sensors.

Cons

Requires use of a diffuser accessory or paper diffuser for more accurate and stable readings, which some users find inconvenient.
App updates caused degraded user experience for some, including forced diffuser use and inconsistent readings.
Issues with fluctuating and unstable readings on some devices, mitigated by turning off diffuser detection.
Calibration process is needed and can be complex; lacks a simple, easy-to-access calibration or accuracy check feature.
UI and usability issues such as missing back button, lack of a par lock feature to hold readings under bright light conditions.

Recent reviews

love it totally changed how good I grow

Jo*****, 2026-07-15

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 photone: Pay for something that was already free before? Hell no, I would rather go buy a real ppfd meter at that point. I used to recommend many people get this app but not something I will do anymore. its always a bait n switch.