# Controls Provides access to all **Advanced features** and lets you perform the following via push notifications: add subscriptions and server configurations, and update existing subscriptions. API usage is supported, as is remote configuration of user apps by device HWID or when the user has added your subscription with a Provider ID. Spam and advertising are prohibited. Delivery is handled via Firebase Cloud Messaging (FCM) and Apple Push Notification Service (APNs). Typical delivery time is 1–15 minutes. **Who to deliver to** * Select a platform (iOS or Android). Each platform card shows how many devices will receive the notification. * Or specify device HWIDs (up to 5 per send) for targeted delivery. **Scheduling** * You can schedule delivery: enable **Send on schedule** and choose the date and time. **Delivery modes** * **Send data for import** — use the text field to send a subscription or server configuration for the user to import. * **Update all subscriptions** — useful when servers change infrequently; when they do, you can push updates without user action. * **Apply settings** — send parameters for remote app configuration. Push controls are available on the **Pro** and **Enterprise** plans. {% embed url="" %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.happ-proxy.com/getting-started/remote-push/controls.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.