There is also a stripped-down "lite" version of AudioTools called SoundTools with some free modules and the ability to try out the paid for modules.
The AudioTools app is available through the Apple store found here: https://apps.apple.com/us/app/audiotools/id325307477
The free SoundTools app can be found here: https://apps.apple.com/us/app/soundtools-studio-six-digital/id1180224503
The app includes a base package of included tools and other modules that are available at an extra cost.
All these extra-cost modules have a 7-day free trial option from within either the SoundTools or AudioTools apps.
For a list of all the AudioTools modules including those which are included and those at an extra cost, check out the Studio6Digital prices page here.
SPL Graph module in AudioTools - by Studio Six Digital
or Click here for more information about AudioTools on the Studio 6 Digital website
Please note that we are the UK distributors for the StudioSixDigital hardware and not their apps. We do not provide technical support for these apps and you should contact StudioSixDigital with your support request.