dBCalc

dBCalc is a simple logarithmic calculator for adding and subtracting decibel levels.

The Program is provided "as is" without warranty of any kind, either express or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
Marshall Day Acoustics does not warrant that the functions contained in the Program will meet your requirements or that the operation of the Program will be uninterrupted or error free.
The entire risk as to the quality and performance of the Program is with you.
If the Program is defective, you (and not Marshall Day Acoustics) assume the entire cost of all necessary servicing, repair or correction.

For full terms and Conditions see www.marshallday.com/mda-mobile-apps/