I have received an email from Igloohome with the title "We say Goodbye to Legacy". If I understand correctly, Igloohome will stop calculating time-limited keys for older devices (in my case, one "Lockbox 1" and one "Lockbox 2") as of December 2023. And for the newer devices (in my case, Lockbox 3), Igloohome will start charging 2 USD per month and per device as of December 2023.
I loved Igloohome Lockboxes for the possibility to compute time-limited keys without connection between the keyboxes and the WiFi network, but I don't like that new Igloohome "pay us every month" rule at all.
Do you know other keybox providers allowing to calculate time-limited keys without requiring the keyboxes to be connected to the WiFi?