Good, but expensive!
It is defenitely a nice tool and very helpful, BUT basically only if you buy the additional modules/plugins. The free tools are good for very basic measurements.
Actually, I didnt expect with regards to the base price the capabilities to be that limited. So if youre thinking of purchasing the tool, make sure, that this is what you are need. The (very powerful) impulse response module costs More that 40 €! Additionally! Compared to other equally complex or powerful apps (e.g. GarageBand) you have to pay a lot, especially for the whole bunch of modules. And: It is still not stable. While testing the apps, I had a few unexpected "shut downs".
Finally it is a powerful, not yet fully stable and unfortunately expensive tool! I strongly recommend to check out thier site, before you decide to purchase.
Jovandrum about
AudioTools - dB, Sound & Audio, v3.4