They are different
1. Via Web Browser
a. Connect your end device to the Wi-Fi of the extender.
b. Launch a web browser and enter http://tplinkrepeater.net in the address bar.
2. Via Tether app
You can use Tether APP to manage the extender no matter which device you are connected to.
3. Via Extender's LAN IP
Log in to the web page of your main router and find the IP address of the extender. Then you can directly enter this IP address in your web browser to access the extender's web page.
For further help or technical support, please visit https://www.tp-link.com/support.