The top podcasts on Apple can vary depending on the region and personal preferences of listeners. However, as of now, some of the popular ones include:

1. "The Daily" – A news podcast by The New York Times.
2. "Serial" – A true crime podcast that tells one story over the course of a season.
3. "The Joe Rogan Experience" – A long-form conversation podcast hosted by comedian Joe Rogan.
4. "The Michelle Obama Podcast" – Conversations with the former First Lady about relationships, health, and more.
5. "Crime Junkie" – A podcast dedicated to giving you a true crime fix.
6. "StartUp Podcast" – A series about entrepreneurial life.
7. "The Dave Ramsey Show" – A podcast about life and money.
8. "The Happiness Lab" – A podcast based on the psychology course by Dr. Laurie Santos at Yale University.
9. "The Moth" – A podcast dedicated to the art and craft of storytelling.
10. "Radiolab" – A podcast that explores scientific and philosophical questions.

Please note that the rankings and popularity of podcasts can change frequently, so it's a good idea to check the charts regularly.