What is the difference between "legacy" and "default" addresses?

There are two types of wallet address: SegWit and Legacy. In the Tangem app, SegWit is displayed as "default", and Legacy as "legacy".

Using a SegWit address reduces fees by 30–40%, and the transaction processing speed is faster than with Legacy. We offer two types of addresses because not all exchanges support SegWit addresses.

You can transfer funds using either of these addresses.