It's an easy way to create a sweeping transaction from a Ledger device that is only valid no sooner than one year from the moment of creation (user can set this parameter). The application then creates a pdf which you can email to your heir.
The main disadvantage is that you have to move the funds to another address of yours to invalidate that sweeping transaction. Any similar projects like this existed before? Thoughts?
That's pretty neat! The concept has been discussed several times before (both on Bitcointalk and on Reddit) as it's probably the most straight forward way to do a dead man's switch in Bitcoin, but it's the first time I see it actually implemented (at least without the necessity of manually creating a raw transaction yourself).
Not that much of an issue if you have separate accounts for daily spending and long term savings. Creating a new "insurance transaction" every few months when you refill your daily spending account doesn't sound that bad.
Well, one can always keep their seed phrase in a safe deposit box (made accessible after your death), with a passphrase passed on via a separate channel (e.g. a notary executing your will, separate safe deposit box). Involves third parties which makes it less fun, but maybe more practical while still reasonable secure for most people.
Alternatively -- just to put it out there -- make your last will a scavenger hunt for your seed phrase. Something out of Indiana Jones. Or Saw, depending on how well you like your relatives.