Photone - Grow Light Meter
Photone - Grow Light Meter
Everyone
Lightray Innovation GmbH
Turn your device into an accurate light meter — for plants (PAR/PPFD/DLI) & more


Average Rating

4.8


Number of Ratings

10,059


Number of Downloads

500K+


Contains Ads

False


In-App Purchases

True


Install Fee

Free


More Info

Details

About Photone - Grow Light Meter

Take the guesswork out of plant lighting with Photone, the most accurate plant light meter app. Measure PAR, PPFD, DLI, lux, foot-candles, and color temperature (kelvin) directly with your phone or tablet. To measure light with research-grade accuracy, Photone uses the most precise sensor in your ... read more

Permissions Required

Summary

Total Permissions

6

Total Categories

2

Highest Risk

7

Average Risk

4

Counts

2

2

2

0

Rating Details





User Reviews

moo kau moo kau
14
Monday, April 21, 2025

I've been using it on and off since beta. Now I see there are "pro" settings they want me to pay $75 to unlock. They also want to sell a diffuser for $40. Oh, but it's "on sale" for an "introducotry" price of $26, except it was introduced years ago. $100+ for a setup that uses my own phone hardware to extrapolate. It's a good tool, but if I want to "go pro," I'll save up the 5x for a pay once, dedicated hardware meter. Edited

Lightray Innovation GmbH
Monday, April 21, 2025
Thanks for sticking with us since the Beta! Your feedback is appreciated 🙏 I’m briefly addressing the points you’ve mentioned: As Beta user you don’t lose any features if you don't reinstall the app 👌 Buying the diffuser accessory is optional. With Photone Pro you’ll constantly get more new features a hardware meter can never match 💪 Angela
Joey Farley Joey Farley
27
Saturday, January 18, 2025

This app has been fantastic, I have the diffuser accessory now, and it made it a lot more stable. I have been using paper and it was reading quite a bit lower than it actually was and I always thought I was having to run my plants with low light and I felt bad always trying to push them thinking I was running low. Now, with the accessory, it seems to be much better. I had to raise my lights and dim one of them, and after a couple of weeks, everything is great. Edited

Lightray Innovation GmbH
Saturday, January 18, 2025
Hi Joey, 🤩 Wow, thank you so much for this review and for taking the time to share your insights and experiences with our app and our diffuser and cosine corrector accessory with the community!🙏 It's really cool to hear that we contribute to the well-being of your plants and your satisfaction with light measuring ☺️ Kind regards, Angela & team
Bryan Mayland Bryan Mayland
112
Friday, April 28, 2023

Look, this app is incredible. For years I used a dedicated lux meter and did all the math myself to convert to PPFD/DLI. Now, I can't even think of a feature I'd want that this app doesn't have. PPFD, DLI, color temp, lux, measurement hold, tilt detector, peak / average values, quick changes for DLI hours, oh and the values are correct too. Never before have I been so pleased with a piece of software! I'd pay for this app for sure, so long as it was a one time cost and not a subscription.

Lightray Innovation GmbH
Saturday, May 6, 2023
Hi Bryan, Thank you very much for your insightful review! We're happy to hear that our app is of such help to you! :) Best, Dominik and the Photone Team
Tony DoMonte Tony DoMonte
12
Sunday, August 18, 2024

Update ruined the entire experience. Forces you to use a piece of paper for the same accuracy as prior when one wasn't required. However, every paper I've tried is different texture, thickness etc and gives different readings. And the app bugs out and tells me I need a paper defuser when one is already attached. It's all way more inconsistent with no way to switch back to the older version which was way more dependable. I guess they want me to buy their third party diffuser but I'll just delete.

Lightray Innovation GmbH
Sunday, August 18, 2024
Hi Tony, I understand that things got more complex, but the update actually makes the measurements much more accurate and reliable. Also you can revert to the previous functionality by changing the light intensity sensor to ALS in settings. If you run into any issues you can always reach out to [email protected]. We're here for you! Dennis
Samantha Vale Samantha Vale
42
Friday, April 14, 2023

Great concept, quick response from support. I had an issue with a tip not dismissing and they got back to me the next day from the other side of the planet. The light readings are pretty far out from my actual meter, but hopefully they can fine tune it for better accuracy. Be sure to look through the extras on the site, they have a great little start of a plant database with light info for various species - looking forward to this being integrated fully into the app in time. Well done, devs!

Lightray Innovation GmbH
Saturday, April 15, 2023
Hi Samantha, Thank you very much for your insightful review! We're happy to hear that you like our app :) If you have an actual meter and want both devices to read the same you can simply calibrate according to that. We have a guide showing how here: https://growlightmeter.com/guides/how-to-calibrate-photone/ Best, Dominik and the Photone Team
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