How to use a Census Card?
What can I do with a Census Card?
A Census card also called a digital note, allows you to:
• Check the validity of the Note and the assets it’s holding
• Transfer funds to other Census or more broadly any Tangem Notes or Bitcoin wallet. (Only Bitcoin, no other forked version or other cryptocurrencies)
• Extract funds from the Census card
• Pay with the card (with merchants currently accepting crypto - see for example CycleBit)
How can I get the Census app?
For Android devices:
• Download here from the Google Play Store
• Tap a Census Note to the NFC-reader on your phone (tap the Note the same way you use your Google Pay) and you’ll automatically be redirected to the Google Play Store.
For iOS devices
• Download here from the App Store
How do I check the validity of a Tangem Note?
If you have ever used Apple or Google Pay, you know exactly how to check the value of a Census Note and the amount of funds it’s holding. You just need to open the App and tap the Note to the NFC scanner inside your phone.
Scanning the Note only takes a few seconds. The app will verify that the Note is genuine, ensure it possesses the correct private key, and obtain the balance from the blockchain. You can always double-check your balance directly in the blockchain explorer if needed. From this point, you can rest assured that you are the only holder of the private key and the funds on the Note.
How do I load funds to a Tangem Note?
Once the Note is scanned and verified, the app will display the exact blockchain address linked to the Note and the private key. You can use any other blockchain wallet app to transfer funds to the Note from a source wallet. You can also transfer funds from another Note using the Tangem app.
How do I transfer funds from a Tangem Note?
To extract funds from the Note, you will need a Note, along with the App on an NFC-enabled Android device.
Scan and verify the Note through the Tangem app, then tap the ‘Extract’ button and prepare the outgoing transaction:
• Define the target wallet address
• Set the amount of funds to transfer
• Accept the transfer fee
You will be asked to tap and hold the Note while it signs the transaction. In the end, the signed transaction will be broadcasted to the blockchain.
Please note: As the functionality of the NFC in the iOS app is limited to read-only, sending data is not allowed. This means that you can check the validity of the Note and any funds it’s holding. But you can’t load or extract them using iPhones. We expect that iOS developers will unlock sending data via NFC in the near future. Tangem will update the app to work the same as the Android version as soon as it happens.
How many times can I use a Census Note?
Census Notes are fully reusable. There is no limit for transactions or for how many times you perform loading/extraction operations.
What funding amount can a Census Note hold?
Census Notes are limitless. You can send as many funds to your Census Notes as you want (but we advise not to put more than US$500 or the equivalent for the same reason you don’t carry that much cash with you on an ordinary day).
Why can’t I extract or transfer funds with my iPhone?
We know it’s a little disappointing that you can only check the validity of the Note with your iPhone. But the functionality of our Tangem app totally depends on the functionality of the NFC in the iOS. Currently, the operating system is limited to read-only, so sending data is not allowed.
This means that you can check the validity of the Note and the funds it’s holding, but you can’t load or extract funds using iPhones. We expect iOS developers to update this functionality in the near future. Tangem will update the app to work the same as the Android version as soon as it happens.