Nok Nok, Inc.
App SDK for iOS v9.4
Hot fix 1
April 7, 2026
App SDK for iOS version 9.4.0.169
Issues fixed in this version
INIT_ADAPTIVE is called twice during transactions.
Previous Behavior: If the username is not present, INIT_ADAPTIVE is called twice during a transaction.
New Behavior: If the username is not present, INIT_ADAPTIVE is called once during a transaction.Authentication by PIN fails in some cases.
Previous Behavior: A successfully registered PIN authenticator fails to work in some cases.
New Behavior: A successfully registered PIN authenticator always works as expected.
Main release
January 14, 2026
iOS App SDK : 9.4.0.165
New in this version
The App SDK includes non-blocking APIs to support modern threading. These improve your application's responsiveness and enable a smoother experience for your end users.
TheTutorial app fetches the required version of the configuration information when scanning the configuration QR code.
The WebAuthn conditional UI works with Quick Authentication.
The logs generated by Nok Nok's App IQ error reporting service contain the username field in the data record.
The App SDK can silently register a new passkey. Just check a box in the Server FIDO policy to allow end users to sign in and create a passkey in one step.
A new biometric UAF authenticator supports silent registration.
The sign-up flow supports the account creation API in iOS 26.
The App SDK is updated to support Public Key Credential Hints set by a FIDO policy on the Server. These settings control the presentation of the user interface for specific authenticators (security key, passkey on this device, and passkey on a different device), enabling more granular UI selection than was possible with Authenticator Attachment.
The App SDK automatically deletes deregistered credentials. The opportunistic deletion of all WebAuthn credentials is implemented in the current release. When a FIDO2 platform authenticator is deregistered, the App SDK tries to delete the corresponding credential from the end user's device.
The App SDK supports Liquid Glass UI.
The App SDK is compatible with Swift 6.
Issue fixed in this version
Authentication on Tutorial watch app times out when using Quick Authentication.
Previous Behavior: Authentication on Tutorial watch app times out when using Quick Authentication.
New Behavior: Authentication completes on Tutorial watch app when using Quick Authentication.
Known issue
Passkey registration is not working if your server uses an IPv6-only configuration. Apple drops your request if the domain record resolves to an IPv6 address only. There is a workaround that works only for enterprise users. If you receive the error below when attempting to register a passkey, consider the suggested resolution.
Error:
2024-03-28 13:37:27.817357-0700 tutorialappplus[523:33297] [Authorization] ASAuthorizationController credential request failed with error: Error Domain=com.apple.AuthenticationServices.AuthorizationError Code=1004 "(null)"
2024-03-28 13:37:27.819386-0700 tutorialappplus[523:33297] [] ERROR | appsdk.NativeFido2 NativeFido2.mm -[WebCredentialsManager authorizationController:didCompleteWithError:]:1200 - The operation couldn’t be completed. Application with identifier SG9R4B6BLT.com.noknok.ios.tutorialappplus is not associated with domain example.com Resolution: Open your project with Xcode and navigate to the entitlements screen. Open Entitlements File > Associated Domains and add the following String Items:
webcredentials:example.com?mode=managed
applinks:example.com?mode=managed Prerequisites
Mac with OS X 26 and later
Xcode 26.0 and later
Swift 5.0 and later
C++ 98 or later
An Apple device with iOS 14 and later
Supported devices
iPhone devices that support iOS 14 and later.
iPad devices that support iOS 14 and later.
A watchOS device, series 2 or newer, running watchOS 4.2 and later.
Also see Upgrading an iOS App.