TuneIn
https://tunein.com/
Step 1. Sign Up for a TuneIn Account
Step 2. Go to TuneIn's Podcasters Page
https://tunein.com/podcasters/
Now that you have a free account, head over to the “Podcasters” section and select “Publish a Podcast.”
Step 3. Submit Your Show's Details
Next, add your contact info. and submit your show’s details including your podcast RSS feed, accept their terms and conditions and click “Send Email.”
Step 4. Wait for Approval
It can take as little as a few days or up to two weeks to receive an email notice from TuneIn that your podcast has been added to their directory.