Thanks for that recommendation, really good app. In today’s app landscape it’s almost unbelievable that it’s so polished and free and without ads / signup links / always-on location sharing etc.
It’s not even easy to find. Few months ago I wanted a simple audio spectrogram app, downloaded some which wanted dubious in-app purchases, or had ads. I hadn’t come across it earlier, but Phyfox does what I wanted better and for free.
That's because Phyphox is financially backed by multiple public bodys of the German governement, mostly the RWTH Aachen and the Federal Ministry of Education and Research as pointed out on the landing page [0].
All you need to do is to start your search on f-droid, the app quality is much better (also consider adding the IzzyOnDroid repo if you don't care about verified reproducible builds)
It’s not even easy to find. Few months ago I wanted a simple audio spectrogram app, downloaded some which wanted dubious in-app purchases, or had ads. I hadn’t come across it earlier, but Phyfox does what I wanted better and for free.