Our wallet review process
We examine wallets starting at the code level and continue all the way up to the finished app that lives on your device. Provided below is an outline of each of these steps along with security tips for you and general test results.
Application build test result
This hardware wallet offers features including a 4-inch touch screen, camera, fingerprint sensor, and runs a custom OS which NGRAVE claims is EAL7 certified.
NGRAVE ZERO comes with a companion app called LIQUID. To sync with the hardware wallet, ZERO generates a QR code to be scanned by the app.
Users can choose between a mnemonic wallet and an NGRAVE wallet. A mnemonic wallet provides the user with a 24-word seed phrase. On the other hand, an NGRAVE wallet provides the user with a key of 64 characters that are split into 8 groups of 8 characters. NGRAVE’s other product, GRAPHENE, was specifically designed to hold these keys.
ZERO has a companion app called LIQUID. This is where users are allowed to make transactions. After the transaction is initialized, the user is provided with a QR code and asked to scan it using the ZERO device. The user then sees the details of the transaction such as the amount, the fee, and the recipient’s bitcoin address. To verify the transaction, ZERO requires the user’s pin and/or fingerprint. Afterwards, ZERO provides the user with a QR code for the now-signed transaction. Finally, the user must use LIQUID to scan the new QR-code and the transaction is verified.
Unfortunately, LIQUID has received critical ratings on the Play Store as users report problems scanning QR codes.
★☆☆☆☆ February 5, 2022
I backed this on indiegogo, and I’ve been so excited to receive it and finally get setup now that I have some money I can put onto my hardware wallet, and the app literally can’t scan its own QR code to synchronize. I want this to succeed, but that’s a pretty poor experience. Please fix and I’ll give a better review!
March 24, 2022
Hi Tylor, Some (mostly newer) phone models have issues with the QR-codes. We have some improvements ready in the upcoming firmware update that should solve this. If you keep having issues, you can aways reach out to firstname.lastname@example.org.
Although we found its official repository on Github, the NGRAVE ZERO’s source code is unfortunately not up for review. The README states that “This repo will contain the ZERO’s firmware” which may mean NGRAVE is planning to make its source public in the future, but as of this review the repository is empty and has not been updated since 2021.
Do your own research
In addition to reading our analysis, it is important to do your own checks. Before transferring any bitcoin to your wallet, look up reviews for the wallet you want to use. They should be easy to find. If they aren't, that itself is a reason to be extra careful.