Reviews of Light Meter - lux and foot candle measurement tool

By: Marina Polyanskaya App

List of user reviews and ratings for Light Meter - lux and foot candle measurement tool

Total ratings

3.80 (Rating count: 121)

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Review summary

The app is praised for being a free/low-cost, easy-to-use tool for quick lighting checks and comparisons, with useful camera-switching for different situations and on-site convenience. However, it is repeatedly criticized for inaccurate absolute readings, inconsistent results between front/back cameras, lack of usage instructions, and occasional instability or non-functionality. Overall, it’s a handy relative-reference tool rather than a reliable professional meter.

Pros

Free or low-cost option
Easy and quick to get readings for quick comparisons
Lets you switch between front and back cameras for different situations
Useful for non-technical uses like plant lighting and room planning
Convenient on-site alternative to carrying a dedicated light meter

Cons

Readings are not accurate compared with professional light meters
Absolute values vary between front and back cameras and across trials
No clear instructions or usage guidance
Not continuous; requires manual sampling
Some users report the app doesn't work or crashes

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User Reviews

Recent rating average: 4.10

All time rating average: 3.80

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30% (15)

Date	Author	Comment
2025-10-16	wa*****	It doesn’t measure constantly, you have to hit a button to sample, BUT it is the ONLY free light measuring app I’ve found that will let me swap cams for different situations!
It doesn’t measure constantly, you have to hit a button to sample, BUT it is the ONLY free light measuring app I’ve found that will let me swap cams for different situations!
2022-12-18	ft*****	I just use a light meter for plants, and for that it's excellent. It need not be perfectly accurate for me, and it's great for comparing the available light under lights and in windows as the days get shorter and the sun gets weaker.
I just use a light meter for plants, and for that it's excellent. It need not be perfectly accurate for me, and it's great for comparing the available light under lights and in windows as the days get shorter and the sun gets weaker.
2022-12-10	Rm*****	The tw c
The tw c
2022-09-03	Ri*****	Have used many times and great for a quick measurement when you don’t need full field equipment.
Have used many times and great for a quick measurement when you don’t need full field equipment.
2021-02-27	ea*****	My I phone has a front and back side camera. I have a screen protector on the face that affects the readings. I make sure I use the back side camera for most accurate results with this app. Can’t speak to accuracy compared to a standard. This app works great for my needs.
My I phone has a front and back side camera. I have a screen protector on the face that affects the readings. I make sure I use the back side camera for most accurate results with this app. Can’t speak to accuracy compared to a standard. This app works great for my needs.
2020-10-31	po*****	Exactly what I needed to confirm my plan for a tropical paradise escape bathroom!
Exactly what I needed to confirm my plan for a tropical paradise escape bathroom!
2020-07-13	et*****	It’s totally possible that I’m using it wrong, but since there’s no instructions, I don’t know how else to do it. It seems pretty arbitrary, like I’ll hold it up to one spot and it will give me a light range from like 18 fcs to 2,000 fcs so idk.
It’s totally possible that I’m using it wrong, but since there’s no instructions, I don’t know how else to do it. It seems pretty arbitrary, like I’ll hold it up to one spot and it will give me a light range from like 18 fcs to 2,000 fcs so idk.
2020-02-28	Ti*****	Tried it with Iphone 11 and compared to a professional lux meter. The readings are off by an order of magnitude (about 8 times)! It is unclear how the developer could have “calibrated” the app when it is so grossly inaccurate. Deleting it...
Tried it with Iphone 11 and compared to a professional lux meter. The readings are off by an order of magnitude (about 8 times)! It is unclear how the developer could have “calibrated” the app when it is so grossly inaccurate. Deleting it...
2019-08-28	Ri*****	Electronic testing. Accurate, easy to use. Simply the best.
Electronic testing. Accurate, easy to use. Simply the best.
2019-08-17	Ha*****	As an investigator of tripping injury accidents, the ability to get a light intensity reading with my phone cuts down on a lot of equipment to lug onto a job site. Love this app.
As an investigator of tripping injury accidents, the ability to get a light intensity reading with my phone cuts down on a lot of equipment to lug onto a job site. Love this app.