A WiFi booster can only bring your device to WiFi access point speed closer to the 802.11 version you are using ( a,b,g,n,.ac) and of course the real maximum speed is that between your router/modem and your ISP.
If your problem is bad WiFi speeds in various parts of your property that the real answer is to install a mesh system. They are quite reasonably priced now. I would look on the web to find the recommended ones. My house is small enough that I don't need to do that but if I was going that way I'd probably buy Unifi gear...not the cheapest but has a good reputation.