I was curious about this app, and i have tried it.
Well i can not deny the convenience of using Fennex in many situations, i can just usemy iphone and start the app, so the sounds come to me loud and clear, effortlessly.
Many situations of use can be made, i dont really know how many, but of course for some people that really need an hearing app for iphone that work with airpods , fennex still the best choice, the quality of sound is very good, also the other features such the hearing test or the presets, make this app ease to use for everybody, also for me that i am not a user interface expert.
Fennex is a really powerfull soundbooster app for augmented hearing and can really upgrade the quality of life of many people.
i also found on the web some interesting article, i suggest to read this one:
https://www.technologyreview.com/s/6...-hearing-aids/