Photone - Grow Light Meter

Name: Photone - Grow Light Meter
Rating: 4.6 (4873 reviews)
Author: Lightray Innovation GmbH

By: Lightray Innovation GmbH App

Perfectly light your plants!

Overview

Version:

4.5.0

Last updated: 2026-07-15

Features & Capabilities

Photone is a camera-based plant light meter that delivers research-grade accuracy for indoor growers. It measures PAR as PPFD, Daily Light Integral (DLI), illuminance in lux or foot-candles, and color temperature in kelvin, including extended PAR with ePPFD and eDLI. By processing RAW camera data and applying per-device calibration, Photone rivals professional PAR meters while remaining user-friendly and ad-free. A diffuser is required for accurate readings (you can DIY with printer paper or use the Diffuser Accessory).

Upgrade options unlock premium features, in-app grow guides, and tools such as a plant light calculator. No ads or location permissions, and a commitment to sustainability through the developer's 1% for the Planet donations. Photone is optimized for grow tents, greenhouses, hydroponics, and other indoor setups, helping you optimize lighting for healthier plants.

User Growth & Download Statistics

App Photography Education Data Analytics

By:

Lightray Innovation GmbH

Rating:

4.60

(4,873) 7 new ratings

Version:

4.5.0 Last updated: 2026-07-15

Version code:

887451433

Creation date:

2019-04-24

Compatible devices:

Size:

84.52MB

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-07-18

Compare stats and ranking:

Ranking

# 27,215 ▼ 54

Other rankings

#61 in light keyword 37 ▼ 1

Other platforms

Photone - Grow Light Meter (v1.4.1)

558,327 4.65

(10,598)

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

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

Developed by:

Lightray Innovation GmbH

Apple Apps Store

https://apps.apple.com/us/app/photone-grow-light-meter/id1450079523

Website:

https://growlightmeter.com

User Reviews

Reviewers largely praise the app for being easy to use and useful for measuring light for plants, especially with the diffuser accessory. However, consistent complaints focus on paywalls gating core features and the extra cost of a diffuser, plus notable accuracy and reliability concerns after updates. Several users feel misled about upfront pricing and would like built-in plant-light calculations. Overall, it’s helpful when it works, but the current monetization and reliability issues are major drawbacks.

Pros

Easy to use with an intuitive interface and straightforward lux mode switching.
Helpful for ensuring plants receive the right amount of light and is used across grows.
Diffuser accessory improves accuracy and speeds readings; many users consider it worth the cost when combined with the app.
Able to measure lux from various light sources, supporting different setups.

Cons

Core functionality is paywalled; essential features require a subscription.
Diffuser is required for accurate readings and is not clearly disclosed in the listing, adding extra cost.
Accuracy and PPFD readings can become unreliable after updates, with reports of drift or incorrect numbers.
Inability to test basic functionality before subscribing; perceived bait-and-switch and unmet expectations.
Occasional reliability issues (crashes, readings disappearing) reported on some devices.

Recent reviews

Whichever light you want to measure it costs , stop touting this app as free. Unless you count the free download .

by ju*****, 2026-06-09

Been using this for about a week or two it’s a pretty good app works as it should however, sometimes it’s hard to hold the paper under the screen or camera and looking at the screen under the bright light. It’s hard to see the exact numbers, but I figured it out. Hopefully, it’s been fixed in the latest update props to this dev team.