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The HMKit iOS SDK makes it easy to work with car data using the HIGH MOBILITY API platform. The SDK implements a strong security layer between your iOS app and the platform while giving you straightforward native interface to read from and write to connected cars.
In addition, the SDK provides a UI component to initate OAuth2 for the end-user in order to retrieve consent for the sharing of data.

Table of contents


Simple: The library is designed to give iOS developers simple access to High Mobility's systems, by handling all the communication protocols, authentication flows and other security related components.

Secure: The SDK is a part of a Public Key Infrastructure (PKI) system, which enables secure communications in an open medium. An example of another PKI system is the Estonian digital ID card, which has authentication and signing capabilities.

Certificates: Access certificates can be securely downloaded from High Mobility using an access token or OAuth. The certificates are stored on the device's Keychain and are encrypted and inaccessible while the device is locked.

ECC: An Elliptic-curve Cryptography P-256 curve from HMCryptoKit is used to secure the connections in a small form factor (compared to RSA). Each piece of data, whether sent or received, is encrypted and signed to avoid snooping and changes to the package.

OAuth: The SDK supports connecting to vehicle portals through OAuth in order to connect to a user's vehicle and accessing its data.


It is recommended to use the library through Swift Package Manager (SPM), which is now built-in to Xcode and accessible in File > Swift Packages > ... or by going to project settings and selecting Swift Packages in the top-center.
When targeting a Swift package, the Package.swift file must include .package(url: "", .upToNextMinor(from: "[__version__]")), under dependencies.

If SPM is not possible, the source can be downloaded directly from Github and built into an .xcframework using an accompanying script: The created package includes both the simulator and device binaries, which must then be dropped (linked) to the target Xcode project.

When .xcframework is also unsuitable, the library can be made into a fat binary (.framework) by running This combines both simulator and device slices into one binary, but requires the simulator slice to be removed before being able to upload to App Store Connect – for this there is a script included inside the created .framework folder.

If BLE is used, the NSBluetoothPeripheralUsageDescription must be added to your app's *.plist, along with a description.


HMKit iOS SDK requires Xcode 11.0 or later, and is compatible with apps targeting iOS 10.0 or above.

Getting started

Get started by reading the iOS guide at
Check out the code references for additional documentation.


Three sample apps available on showcase different use cases for HMKit:

  • Scaffold
    • Demonstrates the most basic implementation of HMKit.
  • Data Viewer
    • Showcases HMKit's usage with both BLE and Telematics, along with High Mobility's unified car-data protocol AutoAPI.
  • AutoAPI Explorer
    • Incorporates all of the "abilities" of the previous sample apps, adds additional commands to send to the vehicle, and uses an improved UI.


We happily accept your patches and contributions to this project. Before starting work, please first discuss the changes that you wish to make with us via GitHub Issues, Spectrum or Slack.

To start developing HMKit, please run git clone and open the Xcode project (Xcode will handle the dependencies itself). Releases are done by tagged commits (as required by SPM, please read more about it here and here).

See more in


This repository is using the MIT license. See more in LICENSE


HMKit.framework – the main iOS library for using the HIGH MOBILITY car data platform







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