I have used Loot in past and this has been discussed here previously but quite some time ago. Just logged in after a year and seems to be no changes at all to the app or web interface.
Previously discussed in these threads;
https://community.monzo.com/t/monzo-rival-loot/4402?u=sc95
https://community.monzo.com/t/loot-issues/24615?u=sc95
https://community.monzo.com/t/loot-web-interface-launched/7821?u=sc95