As a freelancer, you need invoicing, time tracking, client management, and affordable pricing. Here are 2 sound level meter apps ranked for you.
3,049 ratings · Free · 25 MB · 4+
Decibel Meter Master makes your iPhone as a sound level meter，it can measure noise level....
4,623 ratings · Free · 27 MB · 4+
Decibel is the perfect app to evaluate the noise around you : measure the sound pressure, see the spectrum variation, and then compare your recording to the reference chart included in the app. Is it ...