dB Toolkit: Sound Level Meter

Response from developer

Thanks for your vote of confidence in our accuracy :) We did take the time to calibrate the app against the expensive Tecpel device but also other regularly used devices such at the Dayton USB-C mic which is made to be used with iPhone. If you have your own reference microphone you can also enter an offset and sensitivity into the app - just check out the settings page in-app and it lets you know how to do this. Many thanks for downloading our app - we're a small indie-developer so every download and review really helps us. Thank you.