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Crypto Economy

Could not access to the Google Play store?

Try download here(v1.2.17)!

GOOD NEWS! Apple has finally opened full NFC development features to developers on 2019/9/19 and we are currently doing our best to make our App available for the iPhone users. Please be patient and look forward to our release notification!

Video User Guides:

  1. ​​Getting Started with OpenTurnKey

  2. Lock, Unlock, and Authenticate OpenTurnKey with Fingerprint.

  3. Set PIN Code and Back Up Private Key. (To be released soon)

  4. Make Payment. (To be released soon)

  5. Back Up Key Path and Choose Key. (To be released soon)

  6. Sign a Message as a Proof of the Key Holder. (To be released soon)

  7. Dealing with Special Cases. (To be released soon)


Operation /

Status Indication LED

Fingerprint Sensor


Wireless Charging Receiver

Parts introduction:

Operation / Status Indication LED

The LED reflects OpenTurnKey status, such as, Lock state, Low-power notification, standby, or user's operations such as fingerprint capturing/matching, NFC communication, requested data ready, etc. 


Fingerprint Sensor
The Fingerprint Sensor, as the major user operation interface, provides the functions of waken up OpenTurnKey and fingerprint capturing, enrollment, matching, and operation confirmation.

NFC & Wireless Charging Antenna

On the backside of OpenTurnKey, there is an internal hybrid antenna for both NFC communication and wireless charging.

Charging OpenTurnKey


Please test the charging function on a Qi wireless charger with OpenTurnKey before buying the Qi charger. Some Qi charger could not well-coupled with OpenTurnKey's small-sized antenna which leads to unstable charging and heating problem. 

When OpenTurnKey is charging with a  well-coupled Qi charger, the LED on OpenTurnKey should indicate a stable dim-red and only a bit warm up during the charging period. If the LED is blinking in red or the OpenTurnKey getting too hot, please STOP charging with the charger and find an appropriate one instead.

To charge OpenTurnKey, simply place it on a wireless charger. When OpenTurnKey is in charging mode, the RED LED should be lighted up constantly.


Because the antenna of OpenTurnKey is a bit smaller than most of the Qi charger in the market. It is sometimes better to place OpenTurnKey not centered to the charger, but a little bit deviate from the center.


When charging completed, the RED LED will go off automatically.

NFC Communication

To access OpenTurnKey, such as reading the key information, or requesting a signature, will requires a mobile phone (currently only Android App is provided) which supports NFC function.

User can download 'Crypto Economy' app from Google Play store, or here.


To read OpenTurnKey information or execute commands on OpenTurnKey, please approach OpenTurnKey to the NFC reader of the mobile phone with the antenna side facing the reader.

Important Reminders When Using OpenTurnKey!

Despite OpenTurnKey is the most secure, smart, and robust hardware crypto-key in the world, there are a few things you should keep in mind when using it,

  • Enrolling your fingerprint and set a PIN code before deposit Bitcoin to 
    the address of the OpenTurnKey

You need to authorize the access to the private key for signing a transaction either with an enrolled fingerprint or a PIN code, so make sure you have completed the fingerprint enrollment and PIN code configuration and test it before deposit Bitcoin to its address.

  • Always authorize with fingerprint other than PIN code whenever possible

PIN code is an alternative authentication method designed for in the case fingerprint sensor not functioning as it should. Authorizing OpenTurnKey access with fingerprint is the safest way of using OpenTurnKey. If you must use PIN code authentication, please use it only on trusted devices.

  • Backup the private key directly into a authentication protected software wallet

The best way to keep a secret is to let no one knows the secret, including the secret holder. Although OpenTurnKey provides the private key export function. If a user does not export the private key, there is no one on the earth knows what the private key is. However, when a user exports the private key and keep it on a physical or digital media, it creates a risk of leaking the private key to others. If a user wants to have a backup of the private key, the best way we recommended is to import the private key immediately into an authentication protected software wallet such as Mycellium. In this case, either the user loses the OpenTurnKey or the device runs the software wallet, no one can easily get the access to the funds and the user can take appropriate actions, such as move the funds to a new address.

  • Reset OpenTurnKey or change at least one derivative path index

You should not trust any providers, including us. Even though each OpenTurnKey is made of a random master key and a random selected derivative child key. By changing the default derivative key, it guarantees there is no one in the world could know what private key you have chosen.

  • Keep a backup of the derivative key path before choosing a new one

Whenever you want to choose a new derivative key to use, it is a good idea to keep a backup of the current derivative key path in case you will need to access to it later, and don't worry, the derivative key path is not as sensitive as the private key as long as you keep the OpenTurnKey safe. If you have significant crypto assets you want to keep them safe, we recommend you just keep them in an OpenTurnKey, that has been locked with the your fingerprint, and keep that OpenTurnKey in a safe place, i.e. a bank vault. And if you have set a PIN code on OpenTurnKey, you may share the PIN code information with trusted parties to allow them to have the access to the crypto assets in your desired situations.This would work better than keeping a piece of paper that anyone can read as leaving the cash on the table. If you are using OpenTurnKey as a daily payment tool, just keep the deposit amount as least as you usually carried in your wallet which you can afford to lose.