List the devices and functions
Check each exact device's connection standard and controller requirements. Some work through Wi-Fi and an app; others need a compatible hub. The word smart does not establish how the device communicates.
Distinguish equipment roles
A hub, Matter controller and Thread border router have different roles, although one product may combine them. Check the supported roles before assuming an existing speaker supplies everything.
Test local and remote use
Ask what works when the internet, controller or phone is unavailable. Some local functions can remain while cloud services stop. Do not infer outage behaviour only from the radio standard.
Choose for an actual expansion plan
Compare compatibility, updates, account control and backup options. Avoid buying a hub just for a future-proof claim. A smaller working setup may serve your needs better than additional unneeded infrastructure.
Questions about this guide
How do I know whether a device needs a hub?
Check the exact product's setup instructions and supported controllers. A compatibility logo does not establish that every feature works directly from your phone.
Can one hub replace all the apps in my house?
It may centralise selected controls, but some updates and features can still need a manufacturer's app. List the functions you use before deciding what can be consolidated.