Welcome, @Belindac.
Thanks for posting here in the Roku Community!
We see that you want to access your subscriptions through Roku on your Phone. We're here to provide information.
You can access these subscriptions on multiple devices, such as your Phone, computer, and tablet. However, the only way to do so is through the website dedicated explicitly to The Roku Channel. To do so, sign in to your Roku account using the same account you used to purchase the subscription.
To learn more about the Roku Channel, please visit this support article: How to get The Roku Channel.
We hope this helps. Let us know if you need assistance.
All the best,
Emman
Emmanuel-D.
Roku Community Moderator