Cozy by Julian Geywitz might be a bit more popular than Oldio. We know about 1 link to it since March 2021 and only 1 link to Oldio. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Oldio: https://oldio.app/. Iphone app for listening to classic audiobooks. There is a paid version, too, but the free version has everything you need. (Full disclosure, I know the developer). Source: about 3 years ago
Be sure to take a look at Cozy, a GTK audiobook player. Maybe there's some ideas/concepts there for you to borrow! Source: about 2 years ago
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