I am considering getting the 三井住友カード due to the [referral promotion they have going](https://www.smbc-card.com/camp/syoukai/visafriend.jsp) and looking at the website there are two points of concern.
1. They keep mentioning using the mobile app to manage the card: is this the only way or can it be managed via a website too (and does it work on mobile)?
2. They mention the transaction notifications being sent as app notifications. Is there a way to get those via email instead?
Beyond that, they have a “numberless” card that could be interesting, but I cannot figure out if:
1. The card still has a fixed number or one that can be regenerated on demand, like the virtual credit card functionality of EPOS cards
2. The card still has a magnetic stripe (if so, that negates most of the benefit of not having the number printed)