Re: As someone who currently designs chip-enabled cat interface devices...
Our cat flap only uses the RFID tag to allow entry. On the rare occasions when kitty has to stay in (e.g. trip to the vet) there is a physical latch to disable free exit.
I believe you can get a cat flap that is app enabled, so you can control it by your phone, WTF. Are we getting a generation who can only do things via their phone?
Icon because it's nearest to kitty.