I have a new phone and I’m pleased that I have finally one with a decent ALS, the spectral sensitivity curve (if we can trust the specification) is not worse than most cheap luxmeters and so nowthe luxvalues over different light sources and tints can actually be somewhat trusted and compared. And Ceilingbounce can become useful for me.
Here is the curve for my ALS:
Here is the the Vlamba curve describing the lux, which is what a perfect luxmeter should be:
All my previous phones were much much worse and lux values could by specification neither be accurate or comparable. That said, relative light values were never a problem though, and that is what most people use Ceilingbounce for (i.e. runtime/output recordings)