tried to find a clear overview what features the free version cuts out. The website also doesn’t show what cost actually what. for that I’d have to go to the App Store which is another pain and out just says ‘additional costs’ or something, again not explaining the ‘features’ as well as the costs.
Of course there is a chance such a page exists and I just am too dumb to find it…?
help appreciated!
The quick answer? Everything that you need to learn songs by ear is included for free! 
You’ll find more details here. The fact you didn’t find the information easily is entirely my fault, don’t worry!
Thank you so much for the link - ! Very helpful. And thank you so much for offering this great software in such a nice free version! It’s awesome!
In case a discussion re ‘subscription’ comes up again, I’d also prefer a buy and forget version - just saying 