Important: This app requires additional software and hardware before it can be used. To read more about these requirements please visit or contact ffem at

ffem Soil is an open source, inexpensive, smartphone-based drinking water test kit.

Note: ffem Collect app also needs to be installed to use ffem Soil.

With ffem Soil you can test for:
• Available Boron
• Available Iron
• Available Nitrogen
• Available Phosphorous
• Available Potassium
• Copper
• Organic Carbon
• pH
• Zinc

Disclaimer: The user acknowledges and confirms that the tests undertaken by using the product are only screening tests and not a substitute for laboratory tests. Accordingly, the user shall not take any decision on the potability or otherwise of drinking water solely on the basis of using the product.
Read more

What's New

Manganese added
Available Sulfur added
Copper time delay updated
New pH added
New NPK tests added
Read more

Additional Information

February 11, 2021
Varies with device
Current Version
Varies with device
Requires Android
Varies with device
Content Rating
Offered By
Foundation for Environmental Monitoring
Second floor, #125, Infantry Road, Shivajinagar Bangalore - 560001
©2021 GoogleSite Terms of ServicePrivacyDevelopersAbout Google|Location: United StatesLanguage: English (United States)
By purchasing this item, you are transacting with Google Payments and agreeing to the Google Payments Terms of Service and Privacy Notice.