I’ve tried some Navidrome for iOS, which are not hugely numerous, and until now I thought Arpeggi was the best one until I discovered Narjo. You should really try it, as it hugely rich in features, highly customisable both in functionalities and in user interface and it load datas way better than Arpeggi
I mostly prefer open-source softwares if available but as long as my datas aren’t extracted from me I think it’s fair for an app to have a price. Even better if a perpetual license is available We’ll see if it will be worth it