Is it Difficult to Create an App Like Spotify’s Remote Connect Feature?

At its core, the task involves having a program on your PC that can control the necessary functionalities while also running a web server. The web requests would then translate into actions, making the implementation fairly straightforward.

Creating something akin to Spotify's remote functionality isn't overly complex. I developed an Android app ages ago that communicated with a server on my PC. Essentially, it relied on custom RPC over TCP, which allowed for a persistent connection. If your aim is simply to control basic functions like play, pause, or volume, that should be manageable. Just remember, if you're looking to implement specific program controls, it varies depending on how open the program is to such integrations.

You'll want to look into using something like AMQP to send commands from your phone to a broker, like RabbitMQ. On the computer side, you'd need to run a program that subscribes to this broker to execute the commands you send. If you're aiming to control a specific app, check if it has an API available. If not, you might have to get creative and simulate UI interactions using tools like PyGuiAuto. Also, consider that coding for both devices might require different languages unless you stick with something like JavaScript.

Start off by diving into network protocols, socket programming, and APIs. It's a complex journey but absolutely achievable with some patience and consistent effort. Begin small, experiment, and gradually expand your application's capabilities.

If you’re focusing on peer-to-peer communication and all devices are on the same network, implementing device discovery will be key. You can assign unique IDs to each device and utilize UDP broadcasting for discovery. However, if having a central server is an option, setting up something like an MQTT server can streamline the command process between devices.

There are already several apps out there that perform similar functions, like KDE Connect. So yes, it is doable! The effort needed will depend significantly on how many features and extras you plan to include in your app.