---
title: "Authenticator SDK for iOS Developer Guide"
slug: "s3suite94-authenticator-sdk-for-ios-developer-guide"
updated: 2026-10-27T18:42:23Z
published: 2026-10-27T18:42:23Z
canonical: "docs.onespan.com/s3suite94-authenticator-sdk-for-ios-developer-guide"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.onespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Authenticator SDK for iOS Developer Guide

## Introduction

## Purpose

This guide provides developer-focused technical details on integrating with the Nok Nok™ Authenticator SDK for iOS (hereafter referred to as the “Authenticator SDK”) and providing support for the FIDO Alliance’s Universal Authentication Framework (FIDO UAF) specification. By reading this document, a developer will learn how to build a UAF authenticator using the Authenticator SDK for iOS.

## Who Should Read This Guide

This guide is intended for an intermediate iOS developer that already has strong working knowledge of Swift, Objective-C, C++, Xcode, and the iOS APIs.

## Version Information

The guide covers the Nok Nok Authenticator SDK for iOS v9.4.0. Please confirm that you are using the corresponding version of the Authenticator SDK for best results. You can find version information in version.txt.