we spend almost a third of our lives asleep·a twenty-minute nap boosts memory·what nobody tells you about volcanoes·the Mediterranean was once a salt desert·coffee reached Europe through Venice·beavers build dams a hundred metres long·we spend almost a third of our lives asleep·a twenty-minute nap boosts memory·what nobody tells you about volcanoes·the Mediterranean was once a salt desert·coffee reached Europe through Venice·beavers build dams a hundred metres long·

a twenty-minute nap boosts memory·what nobody tells you about volcanoes·the Mediterranean was once a salt desert·coffee reached Europe through Venice·beavers build dams a hundred metres long·we spend almost a third of our lives asleep·a twenty-minute nap boosts memory·what nobody tells you about volcanoes·the Mediterranean was once a salt desert·coffee reached Europe through Venice·beavers build dams a hundred metres long·we spend almost a third of our lives asleep·

what nobody tells you about volcanoes·the Mediterranean was once a salt desert·coffee reached Europe through Venice·beavers build dams a hundred metres long·we spend almost a third of our lives asleep·a twenty-minute nap boosts memory·what nobody tells you about volcanoes·the Mediterranean was once a salt desert·coffee reached Europe through Venice·beavers build dams a hundred metres long·we spend almost a third of our lives asleep·a twenty-minute nap boosts memory·

the Mediterranean was once a salt desert·coffee reached Europe through Venice·beavers build dams a hundred metres long·we spend almost a third of our lives asleep·a twenty-minute nap boosts memory·what nobody tells you about volcanoes·the Mediterranean was once a salt desert·coffee reached Europe through Venice·beavers build dams a hundred metres long·we spend almost a third of our lives asleep·a twenty-minute nap boosts memory·what nobody tells you about volcanoes·

Podcast app for iPhone, iPad, Apple Watch and CarPlay

Ask your podcasts.

Castor transcribes episodes on your iPhone or iPad and takes you to the exact minute where that thing you remember was said. No servers, no accounts, no subscription.

Download for freeon the App Store

Free and ad-free · Castor Pro: €14.99, one-time purchase

Ask

What did they say about naps?

3 passages in 2 podcasts

Pocket ScienceEp. 112 · Sleep
23:41

…a twenty-minute nap boosts memory more than a cup of coffee…
Coffee HourEp. 48 · Habits
08:15

…at my grandma’s, the afternoon nap was sacred, blinds down…

Ep. 112 · Sleep23:41 · Pocket Science

How it works

Everything that’s said, one tap away

Pocket ScienceEp. 112 · Sleep

Transcribing on iPhone68 %

23:12Today we’re talking about something we all do every day.
23:19We spend almost a third of our lives asleep.
23:26And yet, we know very little about sleep.
23:33For example: a twenty-minute nap…
23:40…boosts memory more than a cup of coffee.

Ask

What did they say about naps?

3 passages in 2 podcasts

Pocket ScienceEp. 112 · Sleep
23:41

…a twenty-minute nap boosts memory more than a cup of coffee…
Coffee HourEp. 48 · Habits
08:15

…at my grandma’s, the afternoon nap was sacred, blinds down…

Chapter 3 · The nap

Ep. 112 · Sleep

Pocket Science

23:41−18:02

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Castor is free to listen. If you want more, Castor Pro is a one-time purchase that works on all your devices.

Castor

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Your year in Castor

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Eurozone price; it may differ in other countries.

Questions

Frequently asked questions

Is Castor free?

Yes. You can subscribe to, download and listen to as many podcasts as you like for free, with no ads. Castor Pro adds transcripts, search, Apple Watch, CarPlay and more for a single payment of €14.99, and you can try it free for 14 days.

Is there a subscription?

No. Castor Pro is a one-time purchase: pay once and it’s yours on every device signed in with the same Apple Account.

How does it transcribe podcasts?

If the podcast publishes a transcript (Podcasting 2.0), Castor downloads it. If not, it generates one on your device with Apple’s speech recognition, without sending the audio to any server.

Does it work on Apple Watch without an iPhone?

Yes, with Castor Pro. Download episodes to your Watch and listen with Bluetooth headphones, no iPhone required.

Does it work on iPad?

Yes. Castor is a universal app: the same download works on iPhone and iPad, everything syncs through iCloud and Castor Pro covers both.

Can I bring my podcasts from another app?

Yes. Export your subscriptions as an OPML file from your current app and open it with Castor, or import it from Settings.

Does it collect my data?

No. Castor has no accounts, ads, analytics or trackers. Your data stays on your device and in your private iCloud.

What do I need?

An iPhone running iOS 26 or an iPad running iPadOS 26 (or later) and, for the Watch, watchOS 26. “Ask your podcasts” and summaries require a device that supports Apple Intelligence.

Which languages does it support?

English, Spanish, German, French and Italian. Castor follows your device’s language.

Your podcasts, finally where they belong

Download Castor for free and try Castor Pro for 14 days.

Download for freeon the App Store

Ask your podcasts.

Everything that’s said, one tap away

Transcribed on your device

Search or ask

Jump to the exact minute

From your pocket to your wrist, and your car

Apple Watch, no iPhone needed

CarPlay

iPad

Widgets and Siri

Everything you expect from a great podcast app

iCloud sync

Per-podcast speed

Chapters

Sleep timer

Automatic downloads

New episode alerts

Bring your podcasts

Your year in Castor

No ads

What you listen to is your business

No subscription. Ever.

Castor

Castor Pro

Frequently asked questions

Is Castor free?

Is there a subscription?

How does it transcribe podcasts?

Does it work on Apple Watch without an iPhone?

Does it work on iPad?

Can I bring my podcasts from another app?

Does it collect my data?

What do I need?

Which languages does it support?

Your podcasts, finally where they belong