That is a pity that it is only available through the gulag playstore. That is why I rather not use Fountain. My go to podcast player is antennapod, it works great 😊.
But did you try aurorastore, still only playstore apps, but without account.
Still setting up this #Android phone, none of my goto podcast players can be gotten without the Play Store. It's a real shame, both nostr:nprofile1qqsx2wyjt6lmvc05rrvv05r5hm3w3t7h0pcpmkyswrpd4ymd2u09tscpz3mhxue69uhhyetvv9ujuerpd46hxtnfduq3kamnwvaz7tmwdaehgu339e682mnwv4k8xct5wvhxxmmdqywhwumn8ghj7mn0wd68yttsw43zuam9d3kx7unyv4ezumn9wscn3xgh and #PodcastGuru can't be gotten on zapstore or fdroid, and of course no github available to use Obtanium.