Facebook Login 75 Apps (38% of Top 200)

Facebook Login provides a way for users to login to an app using their Facebook account. It also allows users to grant permissions to the app to access their information or perform actions on Facebook on their behalf. There are also identical SDK's available for android and web development.

Google Sign In 41 Apps (21% of Top 200)

API to add official Google signin to you iOSapp. Objective-C and Swift.

1Password App Extension 21 Apps (11% of Top 200)

The 1Password App Extension SDK enables users to access their 1Password logins on an app login page. It also allows for use of the Strong Password Generator to create unique passwords during registration, and save the new Login within 1Password.

Firebase Auth 9 Apps (5% of Top 200)

Firebase gives you functionality like analytics, databases, messaging and crash reporting so you can move quickly and focus on your users. Firebase is tested and trusted by major companies due to it being run by google.

AF OAuth2 Manager 4 Apps (2% of Top 200)

AFOAuth2Manager is an extension for AFNetworking that simplifies the process of authenticating against an OAuth 2 provider. AFOAuth2Manager is available under the MIT license with full documentation available on cocoapods.

Iovation FraudForce 4 Apps (2% of Top 200)

Simple Keychain 2 Apps (1% of Top 200)

A wrapper to make it really easy to deal with iOSKeychain and store your user's credentials securely.

TW Reverse Auth 2 Apps (1% of Top 200)

TWReverseAuth is a OAuth for Twitter using reverse auth and ACAccount in case your server needs to talk to twitter as well. TWReverseAuth is opensource and accessible via its github repo.

Z XCV BN 2 Apps (1% of Top 200)

A realistic password strength estimator.

Auth0 2 Apps (1% of Top 200)

Auth0 is a platform that offers native or web based app development, server side web applications and , backend and API support. Auth0 gives developers and companies the building blocks they need to secure their applications without having to become security experts through authentication and authorization services.

Confirm iOS SDK 2 Apps (1% of Top 200)

Confirm.io provides simple, safe, and secure mobile ID authentication solutions.

Cocoa Oauth 1 Apps (1% of Top 200)

Cocoa library for creating signed requests according to the OAuth 1.0a standard.

Cocoa Touch (Barcodes) 1 Apps (1% of Top 200)

Cocoa Touch (Barcodes) is the iOSvariant of the original Cocoa Barcodes project developed by Jeff Lamarche's. Cocoa Touch (Barcodes) provides authentic UPC and Code 128 barcodes that pass CCD and laser scanner tests run directly from the screen of the iOSdevice.

Fabric Digits Kit 1 Apps (1% of Top 200)

Fabric gives everyone on your mobile team a complete, real-time understanding of your app's performance and health at every stage all the way from development up to launch, and beyond,.

LTH Passcode View Controller 1 Apps (1% of Top 200)

iOS 7 style Passcode Lock

Oauth Consumer 1 Apps (1% of Top 200)

OAuthConsumer is a cocoapod kit for OAuthConsumer authentication. OAuthConsumer is easy to install, simply add "pod "OAuthConsumer"" to your Podfile.

RS Barcodes 1 Apps (1% of Top 200)

RSBarcodes allows you to scan 1D and 2D barcodes using metadata scanning capabilities introduced with iOS7 and generate the same set of barcode images for displaying and sharing. PR from MacMannes has been merged to make a part of code generators working on iOS5.1 above when RSBarcodes is implemented.

Validator 1 Apps (1% of Top 200)

Validator is a user input validation library written in Swift.

Daon 1 Apps (1% of Top 200)

Trusteer 1 Apps (1% of Top 200)