Smart Card

New hardware wallet, holds your secrets, interfaces via NFC:

Hardware wallets – devices for storing cryptocurrencies offline – make cold storage convenient and much safer than paper wallets. This is because, if the device itself is damaged or lost, the owner can recover their private key by providing certain information to the manufacturer. However, day-to-day usability is restricted with typical hardware wallets because of the need to connect them to a computer.
This is not a problem with Sofitto’s hardware cryptocurrency wallet, the Sugi Card, because it works in conjunction with a mobile app via NFC, which functions as a user interface for the wallet, meaning that there are no cables, no chargers, and no hassle. It’s easy and secure. Users never have to plug it in or recharge it and, contrary to hot wallets, private keys never leave the secure element of the card and are always kept offline.
The Sugi Card is produced in line with the highest security standards in the European Union (ISO/IEC 14443). It is an easy to use, customizable device, which means you can have your name or nickname embossed directly on the card. This customization is unique to Sofitto’s Sugi Card – it is not possible with any other hardware wallets – and helps any user, regardless of how tech-savvy they are, ensure their assets are secure.
The Sugi Card looks just like any other payment card. The private keys stored in the Sugi Card are PIN protected and, right now, Sofitto is developing solutions to make it usable for purchases at any point of sale or for withdrawing money at any ATM.

This is the model I was looking for. The contracts manager is a separate handheld card with NFC interface to on line apps.  Like the Apple privacy manager put inside a plastic ATM card.