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Castella

Castella support: contact, credits, PDFs and accounts

For help with Castella, email [email protected] from the address you use to sign in, if you can. To help us answer the first time, include:

  • your iPhone or iPad model and iOS version
  • the Castella version
  • what you added (text, an article link or a PDF) and, for a PDF, its size
  • the episode name and the status it shows (for example “Couldn’t create”)
  • a screenshot of any error message

Common questions

Do I need an account and an internet connection?

Yes, both. Castella’s servers write each episode and generate the audio, so creating a podcast needs an internet connection and a Castella account. You can sign in with Apple, with an email and password, or with a one-time code sent to your email.

How do credits work?

Creating an episode uses credits. The cost depends on the episode length and the voices you choose, and Castella shows an estimate before you tap Create podcast. Your balance is under Credits & plan in Settings. The Plus plan includes 200 credits per month and Pro includes 600; you can also buy 100 credits as a one-time top-up.

What can I turn into a podcast?

Pasted text or notes, up to 5 public article links, or PDFs. Each PDF can be up to 10 MB; you can add 3 PDFs without a plan and 10 with one. Links and PDFs need you to be signed in. A page that needs a login or a shared document won’t open from a link, so save it as a PDF or paste the text instead.

If a PDF doesn’t work, check it has text you can select: scanned PDFs without selectable text and password-protected PDFs don’t work. Paste the text instead, or use a PDF exported from the original document.

How long can episodes be, and in which languages?

Choose 5, 10 or 20 minutes, or a custom length. Without a plan, episodes can be up to 20 minutes; with Plus or Pro, up to 60. Castella creates podcasts in English, Russian, Spanish, French, German, Japanese and Chinese.

Where is my content processed?

On Castella’s servers. Text you enter, PDFs you upload and the articles you link are sent to Castella’s server to write the conversation, and the voices come from third-party text-to-speech providers. Finished episodes are stored with your account and appear in your Library. Use Save or share audio on an episode to save the MP3 or send it to another app.

How do I get my plan or credits on a new device?

Purchases are linked to your Castella account, so sign in with the same account you used to buy. You can also tap Restore Purchase at the bottom of the plans screen (Settings > Credits & plan > Get credits).

What do I need to run Castella?

An iPhone or iPad with iOS 15 or later, an internet connection and a Castella account.