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CoinKite Coldcard

Reviewed by Yunis
1 April 2021 (Updated 16 May 2023)
Coinkite Coldcard
Coinkite Coldcard

Coinkite’s Coldcard is a simple design and easy to use Bitcoin security hardware in which you can store your Bitcoins. The company Coinkite is a leading bitcoin security expert and hardware manufacturer. ColdCards are manufactured in Canada and delivered with a tamper evident numbered bag which makes sure you are the first user and your information is secure with the device.

ColdCard stands out with its offline signing with the MicroSD feature. You don’t need any special software to use Coldcard, because it accepts standard PSBT (Partially Signed Bitcoin Transaction) transactions stored on a MicroSD card. ColdCard code is open source. All you need to do is connect ColdCard to your computer.

You can connect ColdCard to your computer with a micro USB data cable or using a MicroSD card. But for extended security purposes, avoid connecting ColdCard with a cable, and use the MicroSD method instead.

You can insert a MicroSD in its place on the back of the device, transfer wallet info to the memory card then take the memory card off and insert it to any computer you want to use. By doing so, you don’t transfer your wallet, you simply make a copy of your wallet’s public info only, it is called skeleton wallet file, generated by the Coldcard hardware, After you save the skeleton wallet file on your computer, you can see your balance, send or receive funds. When you are sending funds, you can initiate a transfer order on the computer and save a file to MicroSD and then finalize the process by inserting MicroSD to the ColdCArd, completing confirmations, finally, you need to take the MicroSD card off and insert it back to the computer to broadcast the transaction. The option of using a MicroSD instead of connecting hardware wallet device to a computer is a great feature that makes your funds even safer against all kinds of hackings.

What makes ColdCard even safer is having multi chip inside. Private keys are stored in a security chip which is used only for this purpose. The main microchip is used for all other activities.

You are required to enter PIN code every time you want to use ColdCard. Coldcard accepts Bitcoin only. You can not store other cryptos.

Coldcard has excellent reviews overall, Very easy to use, and simple design with high security. ColdCard has a full-sized numeric keypad and 128x64 pixel OLED screen. The size of the device is bigger than other USB-like wallets. It is a size of a small desk calculator. As it is big enough and has a keypad, navigating is easy. ColdCard’s safety is top level, especially with multi chip function. The company behind the ColdCard is CoinKite which is a leading Bitcoin security expert and hardware manufacturer. The ability to use ColdCard offline with MicroSD is another top level security function. If you forget the PIN code you used for the device, there is no way back. It raises the security standards but users should be careful about this. The company can't provide any help if the PIN is forgotten.

The downside is ColdCard supports Bitcoin only for now. The company announced that they are working on expanding the number of cryptocurrencies supported by their hardware in the future. Ethereum is expected to be the second available crypto accepted by ColdCard.

The Coldcard can easily be used with many major online wallet providers such as BTCPay, Bluewallet, Electrum, and Wasabi Wallet. The ColdCard comes in at a good price when compared to same tier security providing wallet hardwares. Price/Security ratio is too high compared to compatitors.


tick Easy backup to microsd card
tick High security including airgapped operation
tick Multiple high security features


cross Supporting Bitcoin only
cross Less convenient for active trading

CoinKite Coldcard Reviews

Based on a total of 11 reviews across the web for the CoinKite Coldcard we gave the wallet an overall rating of 65%.

User Reviews
Overall User Rating
10 reviews 10
8 reviews 8
2 reviews 2
Amazon USA
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CoinKite Coldcard YouTube Reviews

Which Cryptos Does The CoinKite Coldcard Support?

The CoinKite Coldcard supports only Bitcoin.

Supported Software and Platforms

Which crypto software wallets and platforms does the CoinKite Coldcard support? The CoinKite Coldcard supports 10 crypto software wallets including Electrum, Bitcoin Core Wallet and BTCPAY.

CoinKite Coldcard Specification

Core Data
Brand name CoinKite
Wallet name Coldcard
Input methods Numeric keypad
Mobile app cross No
Tablet app cross No
Desktop app cross No
Open source tick Yes
Altcoin support cross No
FIDO U2F authentication cross No
On screen 2FA tick Yes
Multisignature tick Yes
Hierarchically deterministic cross No
Pin code tick Yes
Passphrase cross No
Shamir backup cross No
Password manager cross No
Memory card slot tick Yes
Not battery powered cross No
Total supported cryptocurrencies 1
Supported languages English
Interfaces MicroSD and USB
Operating systems Windows, Mac OS and Linux
Fingerprint reader cross No
Hidden wallets tick Yes
Anti evil maid tick Yes
Fast destruction tick Yes
Face ID cross No
Segwit tick Yes
Legacy addresses tick Yes
BIP39 compliant tick Yes
BECH32 compliant tick Yes
Physical Characteristics
Weight 34g
Width 50mm
Length 90mm
Height 5mm
Air gapped tick Yes
Display resolution 128x64 pixels
Display type OLED
Touchscreen cross No

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