even though "Add Second Device" is still marked as being #experimental, it is quite solid and has been field-tested for half a year!

if you ever wanted to know about the underlying technology, here is @flub explaining how #iroh is used in #deltachat -
https://www.youtube.com/watch?v=E-e758AYkmA

Delta Chat and Iroh - Floris Bruynooghe

Delta Chat is a messenger using email as transport and with no additional infrastructure. This talk will discuss how the minimalist Iroh is used by Delta Ch...

^YouTube