Hi! There's an Munsell Chart (soil colour description) App for IOS and Android versions. I believe that you should use it with some good sense, taking in account that you shouldn't do the Munsell test with low- or high-luminosity. In the IOS version you can pick the colour that matches the most with your soil colour pattern.

Also check these websites, it can be helpful for you to decide between the Android or IOS App:

http://www.digtech-llc.com/blog/2012/3/16/91-munsell-theres-an-app-for-that.html

http://android.stackexchange.com/questions/43267/is-it-possible-to-reproduce-munsell-colours-on-an-android-device

Personally, the IOS App seems to be better than the Android...

Hi! There's an Munsell Chart (soil colour description) App for IOS and Android versions. I believe that you should use it with some good sense, taking in account that you shouldn't do the Munsell test with low- or high-luminosity. In the IOS version you can pick the colour that matches the most with your soil colour pattern.

Also check these websites, it can be helpful for you to decide between the Android or IOS App:

http://www.digtech-llc.com/blog/2012/3/16/91-munsell-theres-an-app-for-that.html

http://android.stackexchange.com/questions/43267/is-it-possible-to-reproduce-munsell-colours-on-an-android-device

Personally, the IOS App seems to be better than the Android...

Take a look also at the UC Davis soil map app

http://casoilresource.lawr.ucdavis.edu/gmap/

If you need to quickly enter observations in a formal and uniform way, you could create your own database system with HanDBase Database Manager, then download your collection to your PC for data analyses.

it is advisable to go through the munsell soil color charts on line with a clear elaboration on soil color. With this u can interprets it according to soil order.

In the US, SoilWeb will use the GPS in your phone to access NRCS soil data, including a soil profile diagram