LightSpectrum Pro

The "app" shows just black screen only on my iPhone 6 Plus. The link to app support leads to page that is full of producers advertising about it being made for iOS8 and iPhone 6, with no contact information nor link to actual support. I wouldn't have written such honest review if the link to app support wouldn't have been a way to nowhere, if not to mention the gateway to hell it was. Buying this "app" was really a total waste of money and if the producer or seller will not react to this review and do not fix it nor refund the paid amount then there is no other way but to send official complaint to Apple's headquarters, and ask them to take legal actions against the seller of black images that is calling them iPhone apps and charging for downloads of practically nothing. And if some people think that buyers of iPhone 6 Plus are ignorants that can be made to pay €1.79 for "app" that is able to produce no more than dead black screen on their phone, then those "programmers" are very much mistaken and do not know what they are doing. Here is the unedited reply I received from "app support": ------------- hi, I believe that good manners are the basis of all communication and social relationship . I have already submitted the update to Apple that fixes problems with iPhone6 ​​and are waiting for the release , which I think will be soon. but I want to make a note about his arrogance and the fact that you spent a lot of money to buy a iPhone6 ​​plus and turns towards me with the words " paid back immediately and with the addition of a waste of time “ all this for $1,99 ?? Ok , this is your business card , ask for reimbursement from apple and go to hell . poor man . Il giorno 07/nov/2014, alle ore 18:39, ---- Z-Light e Z-Pro: servizi zimbra per caselle con dominio email.it, per tutti i dettagli clicca qui Sponsor: Libri universitari e professionali, oltre 50.000 titoli, scopri di piu' Clicca qui ---------------- Did that above "support" look like support to you? I don't think so.

I have some LEDs where I know the wavelengths, and under some combination lighting conditions the app is super inaccurate—but under lots of conditions (including combination ones) it’s very accurate. Useful tool, overall. I wish they would fix the inaccuracies but I’m still glad I have this app; there’s no other app that has a full spectrogram right now.

This app needs to have crosshairs or circle at a point on the screen, to only take measurements. General averages of the picture isn’t a great feature. Spot metering will make this app awesome!

This inexpensive app does a great job on my iPhone of measuring light color temperature which is exactly what I wanted!

I used to use a $2,000 light meter to measure color temperature when I worked in the film industry. This meter costs only a few bucks and is almost as good. The app description says it’s within 8% of the actual color temperature, which in most circumstances is sufficient. I tested the app in a variety of environments; I.e. outdoor sunny, outdoor cloudy, interior lights, balanced to daylight, cool white, etc. and it worked great. If you’re doing scientific measurements it might not be what you need but for film and video it’s pretty great.

I have a flashlight collection with emitters that are color temp calibrated to temperatures such as 2000K, 2700K, 3500K, 4000K, 4500K, 5000K, 5400K, 6000K (and more!). I found that this app got CCT correct within 100-200K when used properly. I took a white sheet of paper, shined the light on the paper, then read the paper’s reflection. Aiming the app at the flashlight directly gave skewed results by 1000-2000K upwards. It’s so accurate that I had a light I had mislabeled as 6000K, and it kept coming up as 4950K. I checked the LED bin (XP-L HI V3 3A) and it was actually 5000K! So the 4950K was dead accurate. I did notice that as you move away from the 4000-6000K range, the ratings are less accurate. For example, my 2700K lights red as almost 3000K, and 2000K lights read as 2700K. My 660nm pure red lamp reads as 2400K. So keep that in mind. But this is a great value for $2!

I was overcharged the amount of $18.38 when I purchased this app. I need a refund and you need to fix this issue.

Some old-fashioned people think that a quality program should have no misspellings. So think about ‘cancel’ and ‘wavelength’, please. Aren’t you embarrassed by these errors?

App does not measure spectrum. iPhone does not have spectral sensor. I compared this apps readings to Sekonic C7000 spectrometer and a Photo Research PR670 ($20,000 instrument). This app’s readings are completely wrong.

First, the fact that it does what normally takes thousands of dollars in tools is fantastic. No, it's probably not nearly as accurate as pro devices to do this work and having said that, since I don't have access to pro-grade tools I cannot say how the accuracy of this compares. But now I have a way to quantify the various values of light sources, and most helpfully, I can compare them objectively. This is certainly an app that every art, theatre lighting and photography student should own. Such a good learning tool to see how light sources and color interact. For homeowners this tool helps sort through the spec's of the multitude of light bulbs at the big box stores. I'm using this on an iPhone 6s with no problems. My only complaints: -The interface can get cluttered. Using it in landscape mode helps that quite a bit. In portrait mode, at least on my little phone, things get piled on each other. Wish it would run on my older iPad! -The helpful explanatory tips are good, but I wish I could figure out how to shut them off. -I wish I could take screen shots in landscape view. Wish: -Now if it had a way to measure flicker of bulbs! Don't care, make it a separate app or make it a purchasable upgrade for this one. I'd buy it!