Would you use a Grey Card function in a phone app?

[dieselpower]

Etherial - I'm interested to hear what this wonder app is. I'm using a Windows touchscreen phone also and can do most of the above with several different apps, but one app to do it all would be great...

[etherial]

Etherial - I'm interested to hear what this wonder app is. I'm using a Windows touchscreen phone also and can do most of the above with several different apps, but one app to do it all would be great...

This is on an Android device (much better OS than Apple or Windows Phones ). The app is called "Photo Tools" and its developer is hcpl. Their website is http://android.hcpl.be/

Not sure they do one for other platforms. I don't mind it, it puts a few handy tools in your pocket when you're out and about.