Thank you very much!
I will test your modified app if I get a LM4 in the next weeks. Did you test the modified apps with LM3/LM4?
I myself didn’t (my LM4 still hasn’t arrived), but I asked other people to check out the LM4 mods and they confirmed they see all the measurements fine.
I also don’t own an LM3, but I’m sure that the Pro mod should work as well since I didn’t touch anything that might’ve broken it.
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I’ll have to interject again.
To me, what you describe strongly suggests the collection of personal data (or metadata, which is basically enough for user profiles), or at least that this is being negligently accepted. With the best will in the world, I can’t imagine that an app for smart homes needs so many different services and APIs. Tencent and Baidu in particular - what for? In my opinion, only two components are needed to control various smart home components and bug tracking: the API to Opple and to the bug tracker (although in principle this could also run directly via Opple’s API). And extended functions for integrating other services could be designed as opt-ins and additional modules, although I’m not familiar enough with this topic. Either way, I don’t see any problems in designing the app in a data-saving and data protection-compliant way.
I don’t want to accuse Opple of anything, but it’s funny, especially if you look around at what’s going on in Chinese apps. For me, “smart home” is a data protection nightmare anyway, and I distrust every provider in this respect, not just those from China.
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I reinstalled old version Intel driver from 2015, now I get this reported by radex, no more 20/30hz nonsense.
There is still some temporal dithering confirmed with high speed camera.
Price gouging with Opple LM3 now that LM4 has fallen. LOL $140 
on AliExpress HERE
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wow, major price gouge on indeed!
otoh, the Opple 4 is now down to $25, and it works fine with High CRI LEDs, and gives almost identical results as Opple 3.
They both go bananas on Low CRI LEDs… Neither is a science grade instrument, but either is better than nothing, for comparing my own lights to each other, and before and after an LED swap.
Neither is as accurate as a ColorMunki, or other more expensive tool.
Imo the Opple 4 is fine for a home hobby use, just dont expect it to be completely accurate compared to more expensive spectrophotometers.
and fwiw, accuracy is overrated. LEDs vary so much from one to another, that it makes no difference how accurate the spectrometer is… Any values someone gets with their LED will be different with any other LED, even from the same reel and bin and batch, even when using very expensive spectrometers.
For me the key to understand about the LM3 is that even though it is obviously an amateur grade device, I have observed in both my LM3’s that it is CONSISTENT in its behavior. If a unit reads Duv 20 points too positive, it tends to do that in all the LED’s in my own experience. And more importantly the numbers are consistent/repeatable.
The two LM3’s that I have actually show very good accuracy for such a cheap device. My 219b reads minus 80-100 consistently, and 519a 4500k reads 0.0000 consistently. So when I see GT-FC40 at minus 40, I know right away it’s going to look in between. It’s a GREAT amateur device to use together with our own white walling observation.
Had I known about the debacle that is LM4, I probably would have bought one more LM3 in case these break. In retrospect LM3 is such a bargain and if anyone has one, congratulations. Too bad re. the price gouging. But it is tempting. 
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very glad youre enjoying your LM3, I still use mine regularly.
I also have LM4, but seldom use it.
my LM3 and LM4 produce almost identical results, with some LEDs. It seems the LM4 agrees most with LM3 when testing 4500K High CRI
they differ, and the amount of difference changes at other CCT of High CRI. When testing Low CRI the differences are so large as to make me not trust the accuracy of neither LM3, nor LM4.
I dont have any other spectrophotometers, so I dont know what the LM3 or LM4 “variation in calibration” is, compared to a more accurate meter.
But using either LM3 or LM4, I can definitely see large variations between individual LEDs of mine.
For example, here are two DeDomed 4500K 519a. The came from the same batch, bin, and reel, infact they were side by side in the tape. Both LEDs measured on the same LM3, at the same Lumens:
There is a difference of -0.0043, between the two LED samples. Irrespective of the actual calibration error of the LM3.
Individual LED variation can be pretty significant, totally independent from whether the LM3 is actually calibrated to the same zero as a more accurate meter. There are also variations in DUV at different Lumen levels
Point being, accuracy expectations can be unrealistic, when comparing tests of different individual LED samples…
There is so much variation between individual LEDs, that even with totally accurate meters, any DUV test I report from an LED of mine, is guaranteed to be different than an LED of yours.
Despite all those sources of variation, an LM3 or LM4 can be a handy tool for comparing our own LEDs to each other.
I also really like the Flicker Index function of both the LM3 and LM4. fwiw, both meters produce very similar results when testing Flicker Freqency and PWM.
Bottom line, though I prefer my LM3, I dont hesitate to recommend the LM4 at this time. The price is right and it can be an informative tool.
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The LED binning MacAdam-Ellipses have the size of “a human can’t differentiate a color variation” so it should be OK. But it would be interesting how consistent LEDs from one batch read with a good colormeter.
Here is German page about binning in google translate
This lil sh** stoped connecting to Pixel 6a phone properly. Photometry Start button gone, but flicker option works. No problems with old Samsung S5. Any sugestions?
Perhaps you could try Cod3r’s modified App? Opple Light Master 4 discussion thread (new 2023 model) - #979 by Cod3r
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Thanks, it works again! But somehow it recognizes 519A 3500K as a 2700K. I have nichia 2700K, so I can compare both leds and they looks different,but not for opple 3 
Oh… that’s interesting… they both show 2700k?
Checked with old phone and app. Its same 2700K 
Phone camera cant see difference too. WB daylight. By the look 3500K kind off brighter… Both leds from Simon. Dont know that to blame now. Opple ,Simon or Nichia . 
Look pretty similar, so the Opple might be right…
Waiting for post from Simon with another 3pcs Nichia 3500K. Will compare it latter.
Naahh, compared with house ligts bulp recognized as 3000K. Nichia 3500K looks a little bit colder. I quess Opple sucks and phone too.
Hmm… phone picture is not good for evaluating any single LED, but does show difference between 2 LEDs very well as long as the 2 LEDs are in the same picture (so they have identical wb settings). I think your Opple might be working. Best of luck.
Found old xml2 3500k. Opple 3 thinks it is a 3000K at best 3100K. It just can not see 3500K. Like preprogrammed… If anyone has 3500K light, could you test it? I would appreciate knowing your results.
Any LED, or xml2 only?
My Nichia 219b 3500k in D4V2 host, tested a couple weeks ago:
3518k with LM4 using Opple Smart App
3497k with LM3
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LEDs are not exactly all the same as their Nominal CCT, and Opple is not a calibrated science grade tool.
here is a “3500K” that Opple thinks is 3885K:
otoh, here is a DD 4500K 519a, that is actually hitting very close to 3500K (3526K):
dont expect any LED to be exactly the CCT it is binned with. LEDs are like chocolate chip cookies, there is no guarantee they all have the same number of chocolate chips 
Even if you and I both test a 3500K LED with a calibrated science grade spectrophotometer, each LED will produce a different result. The only way you and I could get identical results, would be to test the actual same LED, using the same calibrated instrument.
Here are two DD 4500K, and though their CCT tested on Opple 3 is very similar, their Tint DUV is quite different:
the Opple cct and duv tests will also produce different values at different outputs…
dont expect exact accuracy from any two LEDs… regardless how expensive and well calibrated the spectrophotometer is
Opple is just a way to compare your own LEDs to each other. It provides relative info, not precise repeatable values that would apply to every LED
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