With the Free system, you will need a good internet connection to use Log my Care. If you've already invested in Wi-Fi coverage, great!
If you're lacking Wi-Fi coverage in just a few areas, you can try
A data SIM in one of these WiFi hotspots
A WiFi range extender
BT Home Hub extension kit
Upgrading to Pro to get offline mode
Alternatively, having a professional install WiFi with full coverage will typically cost £1,500 and upwards, depending on the size of the building. We can put you in touch with reliable contractors, just chat to us.
Perhaps the easiest thing is if you have good mobile signal in the home, you can buy a 4g data SIM for each mobile device. On Three, these are only £28 for 12gb and the data will last for a year before it expires.