> For the complete documentation index, see [llms.txt](https://superfluid.gitbook.io/superfluid/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://superfluid.gitbook.io/superfluid/developers/superfluid-subscriptions.md).

# Superfluid Subscriptions

## Building Subscriptions with Superfluid

When building a subscriptions product on Superfluid, we expect that you’ll need a few things

1. You’ll need to enable users to create a subscription stream, update that stream if they change their plan, or delete that stream if they opt to cancel -> our widget offers these features off-the-shelf, check out [Superfluid Checkout Widget](/superfluid/developers/superfluid-subscriptions/superfluid-checkout-widget.md)
2. You may need to validate whether an address is currently streaming to you, and perhaps get a list of all addresses currently streaming to you -> see [Implementing Subscriptions in your App](/superfluid/developers/superfluid-subscriptions/implementing-subscriptions-in-your-app.md#getting-stream-data)
3. You’ll need to know when a user deletes a stream or updates their plan so that you may make the proper changes to their account. -> see [Implementing Subscriptions in your App](/superfluid/developers/superfluid-subscriptions/implementing-subscriptions-in-your-app.md#events)

There are many ways that this process can be managed, and your implementation will depend on the needs of your users. With that said, here are a few concepts & code examples that should help you in your development.