You can use any app like (NFC tools) to use our card (it is industry standard) to write and read information stored on the card
Ok that is better, but I am careful with NFC that is just short range antenna, so in theory it can be hacked.
For now, it is in test, so please take a look on this video
Card on this video doesn't look like it's made from stainless steel to me.
I would remove word Crypto from card or add something like CP shortcut, to avoid getting attention from other people.
There are similar apps, but they are cryptocurrency wallet. CryptoPlatz it is not a wallet, it is a storage to save you seed recovery phrase. CryptoPlatz it is compatible with Trezor, Ledger, Exodus, TrustWallet and any other wallet that demand you to save the seed recovery phrase on a paper.
No, I am sure Satochip/Satodime/SeedKeeer and one other company (can't remember the name) have cards who can be used only for storing recovery phrase.
Maybe they are not made from stainless steel but they work in similar way like Crypto Platz.