AntennaPod is a Podcast Player open source. It is a free, open source and ad free application with a clean and elegant design and all the features that I need in a Podcast player / subscription manager.
And it is the player that I have been testing for a while and that works wonderfully for me. I use it with F-Droid on Android, although you can also find it in the Play Store.
Until now I used iVoox and I have changed its more than 100Mb for AntennaPod of just over 10MB. iVoox, in addition to the ads, constantly crashed on me, which made it unbearable. It is a great alternative to many commercial players.
In this way, it works very smoothly for me, I have no ads and I use an Open Source option and on F-Droid. At the moment everything is advantages.