Charge for each feature – Decibel Meter(Sound Meter) Review

You try a feature and they charge you. Ok. Now I have the advanced version. No. They want to charge again for each feature you want to use. Annoying and a bit deceitful. Product has a pretty display but I can’t tell if it’s any good or not.
Review by JohnJomtien on Decibel Meter(Sound Meter).