iOS 12.3 updates the Apple TV app and adds a new feature called Apple TV Channels. Channels allow you to subscribe to third-party streaming services such as CBS All Access or HBO, right from the TV app. You can see the content of the TV app served directly from Apple without installing any other apps.
Here's all you need to know about what services are available like Apple TV channels, what they cost, and how they work.
How do I get Apple TV channels?
This new feature is not yet available – Apple says it will be launched in May along with a redesign of the TV app. This redesign (and a few early channels) is available in the iOS 1
To get channels, update your iPhone or iPad to iOS 12.3 or your Apple TV HD or Apple TV 4K to tvOS 12.3. The TV app is not yet available on macOS, but it will come later this year.
The TV app will also be available this year on Roku, FireTV and multi-brand smart TV, including Samsung, Sony, LG and Vizio.
How do I subscribe to a channel?  This part is easy. In the TV app on your iOS device or Apple TV, just scroll down in the Watch Now tab – a list of channels must appear prominently. Most want a button that says "Try it for free." If you select this, an approval screen will appear in the app that shows the length of the experiment (usually one week) and the recurring subscription price after the trial is over.
When browsing a channel's content (see below), you will be presented with Try It Free Buttons on Shows and Movies.
How does playback work?
After subscribing to the Channel, you can watch shows and movies recommended directly in the Watch Now tab.
As you scroll down the Watch Now tab, you will also see a horizontal list of channels represented as circular icons. Select one and you will see everything available on that channel (whether you subscribe to it or not).
Choose a show and you will see an info card showing seasons, episodes, cast and crew, and more along with a prominent "Play" button. On Apple TV, you may see another format, such as "Play first episode" and another button for "Add up next."
You can play content right here, directly without having to install other apps.
What channels are available and what do they cost?
With the first beta release of iOS 12.3 and tvOS 12.3, only four channels are available: Showtime, Starz, Smithsonian Plus and Tastemade. During its "Show time" event on March 25, Apple promised channels from many other partners. Here is the list of all the channels we know, along with their monthly subscription price (if we know it).
- Acorn TV unknown
- Britbox unknown
- CBS All Access unknown
- Comedy Central Now unknown
- CuriosityStream unknown
- Epix (unknown)
- Eros Now unknown
- HBO (unknown)]
- History Vault (unknown)
- Lifetime Movie Club (unknown)
- MTV Hits unknown
- Mubi unknown
- NickHits unknown
- Noggin unknown  Pantaya unknown
- PBS Living unknown
- Showtime ($ 10.99)
- Shudder unknown
- Smithsonian Channel Plus ($ 4.99)
- Starz ($ 8.99)
- Sundance Now
- ] Tastemade ($ 4.99)
- Up Faith & Family Unknown
- Urban Movie Channel (unknown)
While the new TV app expands to over 100 countries, the list of Ailable Channels may vary from one to the other next, as it will price.
What if I already subscribed to one of these services?
If you subscribe to any of these services, you will not be able to use your current subscription as a channel in the TV app. Most of them still integrate with the TV app so you can watch content on the Watch Now tab, and your shows and movies appear in Up Next. But you need the appropriate app installed and will be kicked over to play content. You will also be billed through the content provider, not Apple, and may not be able to use family sharing.
To play directly in the TV app, family sharing and billing from Apple, you need to cancel your existing subscription and re-subscribe via the TV app's channels.
What about Amazon, Netflix and Hulu?
Netflix does not work with Apple at all on the TV app. The content does not appear on the TV app in any way. Just install the Netflix app and use it.
Hulu is not a channel. You cannot subscribe and watch directly in the TV app, but the service supports TV app's features. So Hulu content is displayed in the TV app's tabs and search, and its shows will fill up the next section. You must have the Hulu app installed in order to play shows or movies and you must subscribe via the Hulu app or site.
Amazon Prime Video works just like Hulu does: It's not a channel if you install the app and have a subscription, all content is integrated into the TV app.
Can I buy bundle of services?
So far, Apple has not mentioned any channels bundles. It would be sensible to offer such a thing as the libraries' channels are growing, but at present they are all a la carte.