Light reading apps

I've 2 of them on my phone
I dont trust them at all
They both give different readings
Are they just useless or does anyone know how to calibrate them ?
What's you guys advice

PPFD Meter is the one i use and its pretty accurate

Less about the app and more about the phone's hardware.

gooshpoo said:

PPFD Meter is the one i use and its pretty accurate

Click to expand...

This. You can even add a cheap bluetooth sensor for pretty damn accurate readings.

Photone on my iPhone and their add-on, for the win with me.

Downloaded them and exactly what's the ideal ppfd I should be looking for

I've ppfd meter and photon
Both give different readings
Ppfd meter is aboit 100 to 150 higher than photon

joesoap2013 said:

I've ppfd meter and photon
Both give different readings
Ppfd meter is aboit 100 to 150 higher than photon

Click to expand...

Different apps work better or worse with different phones, and not in a predictable way. I found benchmarking Photone with my iPhone Xs Max it was within less than 10% variance from my Phantom Photobio, but others depending on what phone/hardware have not been that lucky or close.

That all said, It's well worth using the DLI calculator on the photone site to help dial in either your DLI or your PPFD. It's a useful tool no matter what meter you're using (I use it with my Photobio).

I never trusted any of those apps. Phones simply arent designed to read light levels that accurately. A decent meter is like $40.