KēZ Plug & Play Adapter
Car Rental / Car Sharing

Leverage smartphone technology to free your car owners from the burden of a physical exchange of keys.

How Does the Smartphone App Work ?

Easy to use access sharing smartphone application.

Car renting & sharing is now

Once you have installed the KeZ adapter into the OBD port of your car, then:

Open the Apple or Google Play Store and search for “KēZ”. Download the app once you’ve found it. Then, click on “Owner Login” at the bottom of the screen to create an account. You’ll need to validate your email and phone number.

Get your car on!

How To Use App Video

Car Access in
Three Simple Steps

Enter phone number and location of the car into the KēZ app

Available on both iOS and Android smartphones, the KēZ app is simple to download and provides easy and convenient access to your car(s).

Send the digital key to the person with whom you want to share the car

Digital keys are sent from the KēZ app via text message. The car owner inputs the receiver’s telephone number into the app, creating a link that is automatically sent to the receiver’s phone.

You will receive notification when the car is opened

The receiver approaches the car and clicks on the link received from KēZ. The receiver is redirected to the app store and must download the app. The receiver clicks "Start Driving" which unlocks the car's doors.



Leverage smartphone technology to free car owners from the burden of the physical exchange of keys.
Use our technology to fuel explosive growth in your P2P business.

Keyfree is here to facilitate that growth with a solution that is affordable, simple and secure.


Share digital keys with your renters so they can lock and unlock vehicle doors through their smartphone. Eliminate the complications of having to meet up to exchange physical keys.


Place your vehicle[s] anywhere including remote locations such as underground parking lots. By using Bluetooth and not cellular data, your renters won’t have to worry about poor connection areas.


Cancel digital keys with the same ease as sharing them. Simply log in to your account, select the digital key after a rental and cancel that renter’s ability to access your vehicle.


Have the option of time-stamping your vehicle[s] so you know exactly when they’ve been picked up and dropped off. Keep tabs on rentals with ease with the Keyfree timestamp feature.


The Keyfree solution is compatible with many makes and models so your personal fleet of vehicles can be covered.

KēZ Premium features include the following:

Smoke Detection

From lending your car to a friend to on-demand car rental and peer-to-peer car sharing for corporate fleets, KēZ is pioneering smart phone-centric technology to power the revolution in smoke detection.

The KēZ adaptor and app provides a smoke detector and log which can detect smoking within the vehicle and will create a silent history record, and if required a sound alert if smoke is detected. The history log is created to record the time, date and level of smoking within the vehicle which can be downloaded from the KēZ app. 

Car valuation experts say that cars can lose as much as $2000 from their resale value if they have been smoked in. 

Many rental and car sharing companies charge a penalty for smoking in the car, KēZ will record the state and time of an occurrence and will sound an alarm if required.

Speed Recording

Having KēZ installed allows you to set speed controls on your car with the time and date that speeds were recorded over the speed limit selected.  Whether it is to check on your son or daughter, your renter speeding in your car, or your insurance requirements, KēZ will record the information for you.

Security Alarm

The alarm system in most cars are sophisticated but will only alarm if there is an attempted intrusion. The KēZ app has variable adjustment capability and it can be adjusted to the highest level so that if the car is touched the alarm will be activated and the horn will honk. Keeping your vehicle protected at all times. 

The KēZ adaptor will provide:


driver behaviour


vin authentication


Smoke Detection


Battery Evaluation


Mileage log


Speed log


All KēZ systems are fully digitally controlled using state of the art microprocessor technology

with security features to the highest level. These additional features are compatible with 90% of vehicles.

Driver Behaviour

Keep a record of driver performance

VIN Authentication

Provides authentication of driver

Electronically provide access to your trunk

Give anyone access to your trunk with a few taps on your smartphone

Log battery function

Detect low battery levels so you will never be stranded again.

Mileage tracking

Keep a record of distance travelled and time-stamp each trip

Lot Monitoring

Manage multiple vehicles with single parking location. Know what vehicles are coming and going and have a report on the KēZ smartphone app.

The KēZ Smartphone App leverages the smartphone to allow for 3rd party services to dispatch road service such as tow trucks, mobile mechanics, or car detailing.

Have some questions? Need some help?
Get your answers below.

Yes. Keyfree Technologies Inc. is prepared to work with any car rental company that sees the substantial benefits of using its adapter and app in order to provide information on the car driven by the renter.

No. Every renter who wishes to enter the program offered by the car rental company does so willingly and with the renter’s full approval, in order to obtain the benefits being offered by the car rental company.

If required, the adapter can very easily be programmed to provide information on all the above. It already has an accelerometer chip which is used to detect and log rapid acceleration and hard breaking. Adaptor has its own clock which can be set to capture driving of the car during the risky hours.

No it does not require a data plan, but end users would require a smartphone with internet connectivity to receive a digital key.

Yes. The approved driver’s could defeat the confirmation of the VIN and the smartphone ownership, but all of the other information would still be collected by the KēZ adapter and stored on the KēZ server.

The owner, whenever required, can draw the information from the server in a PDF format.

No. The KēZ adaptor will not “run down” the battery of the policyholder’s smartphone. All of the information obtained from the KēZ adaptor and app is stored on the KēZ server and the policyholder’s smartphone is not used to send information back to the insurance company. The KēZ app is of course downloaded onto the policyholder’s smartphone.

KēZ is compatible with most passenger vehicles dating back to 1996. Just enter your vehicle information on “Compatible Vehicles” on the Home page to see if your year and model vehicle is compatible. For some new cars, access will be in conjunction with the vehicles’ API or hardwired harness for which instructions will be available on website or KēZ app.

KēZ is protected by 256-bit encryption technology, making it resistant to hacking attempts.  It incorporates different layers of digital security features when accessing a vehicle. In addition, digital keys can be disabled or deleted at any timer. KēZ is in fact more secure than your traditional key. It allows you to selectively allocate keys to vehicles or freeze the usage of keys to users anytime.

Looking for more resources?

Find a lot of useful resources and tools to customize the KēZ adapter with your personal vehicle or fleet.

KēZ w/ Vehicle Tracking

Kickstarter Launch