I posted this recently here:
2012coleman wrote:
Due to the placement of my router in my house, I've had poor WiFi reception in other areas of the house and outside by the pool. A friend told me about the AmpliFi HD WiFi MeshPoint range extender.
I bought one and set it up the other day. I now have extremely awesome connectivity throughout the house and to the edges of my property. No longer suffering from lag while streaming shows on the TV. It has an app for setup and shows what devices are connected.
This is not a repeater that has a different network name. It connects to your Wifi - needs the password, and amplifies the signal from your router. You can get more than one as they connect in series.
I did have to reconnect to Wifi on my devices - TV, Receiver, etc.
Saved me a lot of money as I didn't have to buy an entire mesh setup.
So you should be able to connect to your 5g Wifi band using the app - assuming the fast and slow bands have different names. Very easy to set up and works with your existing router.