TP link HS 110 comes with energy Monitoring and HS100 doesn't have that option. Shop back $5 challenge will cut down the cost to $14.
Features
Turn electronics on or off from anywhere with your tablet or smartphone using the free Kasa app (iOS, Android).
Track real-time and historical energy use to stay informed and save on your next bill(HS110 model).
Use Away-Mode to turn devices on and off at different times to give the appearance that someone is home while you are away.
Check on devices remotely, create schedules, and set timers.Add voice control to electronic devices by pairing with Amazon Alexa or Google Assistant (sold separately).
Easy to use and install. Just plug a device into the Smart Plug and connect to your Wi-Fi network.
3-year warranty, and 24/7 unlimited technical support.
TP LINK HS100 Smart wifi plug
https://www.ebay.com.au/itm/NEW-TP-LINK-Smart-Wi-Fi-Plug-HS1….
Note: Please change your encryption to WPA2 PSK only instead of WPA+WPA2 PSK
if in case you won't be able to join both of your device wifi and your network. Then factory reset the plug and try to connect again. Credits to tplink community.
I think using codes will void your cashback