The amount of data that Apple Podcasts uses depends on the length and quality of the podcast. On average, an hour-long podcast can use about 60MB to 100MB of data. This can vary based on the audio quality of the podcast. If it's a video podcast, it will use significantly more data.

You can reduce the amount of data Apple Podcasts uses by downloading episodes over Wi-Fi before you go out. This way, you can listen to them offline and save your mobile data.

Remember to check your data usage regularly to avoid any unexpected charges.