BitBox02 Nova Review: Swiss Simplicity Meets Open Firmware

We set up a BitBox02 Nova from a cold start, paired it with an iPhone over Bluetooth for the first time, then restored the same wallet from a microSD backup on a second device to see whether Switzerland's approach to a hardware wallet holds up against the two brands most buyers already know.

Open source without giving up a secure chip

Ledger protects its devices with a certified secure chip but keeps the firmware running on it closed, so nobody outside the company can audit exactly what that chip is told to do. Trezor goes the opposite way, publishing firmware openly, but its own comparison materials concede that a plain secure element isn't present on every model. BitBox picked both: the Nova's firmware and hardware design are fully open source, and it still runs on an OPTIGA Trust M V3 chip certified to EAL6+, the same assurance level used in banking cards and passports. That's a genuinely rare combination, and it's the strongest argument for choosing the Nova over either established competitor.

iPhone support arrives through a new Bluetooth protocol

The previous BitBox02 only paired with Android over USB-C; the Nova adds iPhone and iPad support through Whisper, a custom Bluetooth Low Energy protocol that BitBox built specifically for this device. Whisper runs on its own isolated chip with no memory and no access to wallet secrets, and every message it carries is end-to-end encrypted, a design meant to answer the obvious objection to putting Bluetooth anywhere near a device that holds private keys. If that still isn't reassuring enough, Bluetooth can be switched off entirely and the Nova falls back to wired USB-C, the adapter for which ships in the box alongside a USB-C to Lightning cable.

What a buyer actually pays

BitBox's own shop lists the Nova at €175 including VAT for EU customers, and our work order's US price point of roughly $169 lines up with that once VAT is stripped out. That sits above Trezor's entry-level Safe 3 and below Ledger's touchscreen Stax, positioning the Nova as a mid-range buy that competes on security architecture rather than on being the cheapest option on the shelf.

BitBox's own comparison page against Ledger and Trezor makes the same case in table form rather than prose: it lines up secure-chip presence, open-source status and supported platforms side by side, and the Nova is the only row with a checkmark in every open-source column while still carrying a certified chip.