Yes, you can.
You need two smart devices. You use one device as a hotspot to provide a network and another device to connect to the hotspot.
Step 1: Turn off your home WiFi, but write down the full name of your WiFi and the password as well.
Step 2: Get Device A and set the Personal Hotspot the same name and password as your home WiFi, then turn the Personal Hotspot on.
Step 3: Use Device B and install the App 'Freshin Smart Life’
Step 4: Link Device B to your Personal Hotspot of Device A. Then set up the Freshin smart devices as normal.
Step 5: After set up, turn off Personal Hotspot in Device A, and you may change both the name and the password back to your previous edition.
Step 6: Turn on your WiFi.
Then feel free to enjoy your Freshin smart devices with unlimited smart functions!