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This is awesome. In Canada, GO transit is also capped per day. Unfortunately for me, that cap was something like $20/day when I was really using it frequently.

We have something similar in Switzerland called FairTiq

> and per week

Though only on a fixed Monday to Sunday period. So if you arrive and depart mid-week, you might pay up to an additional capping period and buying a weekly travelcard could work out cheaper (provided you know in advance which zones you need).

A travelcard also lets you buy slightly cheaper rail tickets for travel outside of the TfL zones (tickets to/from "Boundary Zone n", with n being the last zone in which your travelcard is valid), whereas with contactless the same trick requires physically getting off the train.