Most Used SDKs in Top 200 Free iOS Apps

Facebook Audience Network 51 Apps (26% of Top 200)

Facebook Audience Network is designed to maximize revenue with diverse demand from global advertisers. Facebook Audience Network helps you monetize your app by showing highly targeted ads that match the interests of your users.
AppsFlyer 49 Apps (25% of Top 200)

AppsFlyer offers you an amazing tool that allows you track customer experience and preference inorder to make better marketing decisions. The AppFlyers tool offers you top of the line marketing analytics that are guaranteed to improve your overall performance with over 2000 integrations for your mobile applications whether game, ecommerce or travel inclined.
Google Utilities 44 Apps (22% of Top 200)

Google utilities are several tools made available by Google to developers and other individuals to use on permission. These tools range from Google Sheets, Google Docs, Google Slides, and Google Maps, to name a few.
Adjust 38 Apps (19% of Top 200)

Adjust is a mobile marketing management tool that unifies all marketing activities within a business into one platform. Adjust can intergrate with over 2,000 different ad networks spanning across multiple platforms including web, mobile and TV.
UnityAds 38 Apps (19% of Top 200)

Unity Ads is a comprehensive monetization platform for Unity, iOS, and Android developers. Use it to easily monetize existing player base. The Unity Ads provides a comprehensive monetization framework for game.
Bolts 37 Apps (19% of Top 200)

Bolts is a collection of low-level libraries designed to make developing mobile apps easier. These libraries, originally created by Facebook and Parse, have been open sourced and made available to others without a mandatory Facebook developer or Parse affiliation. Bolts includes "tasks", which make organization of complex asynchronous code more manageable, and an implementation of the App Links Protocol, which helps link content in other apps.
SupersonicSDK 37 Apps (19% of Top 200)

The Leading Mobile Advertising Technology Platform
WhatsApp 37 Apps (19% of Top 200)

Whatsapp is a web-based mobile messaging platform that can be easily implimented into any app. The Whatsapp messaging SDK runs on iOS8 and later.
Unity3D 37 Apps (19% of Top 200)

Unity 3D tool has features such as visual editor, multi-platform game build support, full and robust scripting and animation system to provide robust development for high-quality games and apps. Unity3D is a powerful cross-platform 3D engine and a user friendly development environment. Easy enough for the beginner and powerful enough for the expert.
VungleSDK-iOS 36 Apps (18% of Top 200)

Vungle's iOS SDK'
ironSource 36 Apps (18% of Top 200)

ironSource builds technologies that help app developers take their apps to the next level, including the industry’s largest in-app video network, a robust mobile ad mediation platform, and a data-driven user acquisition platform. ironSource offers you means to monetize your applications through AD campaigns.
FL Animated Image 34 Apps (17% of Top 200)

FLAnimatedImage is a performant animated gif engine for iOSthat cna play multiple gifs with a play back speed that comparable to the speed of a computer. FLAnimatedImage is good for apps that do not yet support gifs or apps that want higher performance.
Google Maps 34 Apps (17% of Top 200)

Google Maps iOSSDK offers the opportunity to add maps data to your application. Google Maps SDK automatically handles access to the Google Maps servers, map display, and response to user gestures with the option to add markers, polylines, ground overlays, and info windows to your map.
Google Sign In 34 Apps (17% of Top 200)

API to add official Google signin to you iOSapp. Objective-C and Swift.
AppLovin 34 Apps (17% of Top 200)

AppLovin offers a comprehensive platform where app developers of all sizes can connect with their ideal consumers and get discovered.
AddLive 34 Apps (17% of Top 200)

AddLive provides a simple and convenient way to integrate live video, voice and text chat into applications by supplementing the emerging open WebRTC standard. It allows developers to add high quality, low latency, video conferencing to an app where, instead of users calling each other, they connect to the same scope on a server.
Alamofire 33 Apps (17% of Top 200)

Alamofire is an HTTP networking library written in Swift. In order to keep Alamofire focused specifically on core networking implementations, additional component libraries have been created by the Alamofire Software Foundation.
Applozic 33 Apps (17% of Top 200)

Applozic provides you with chat SDKs and messaging APIs to build Realtime Messaging experiences on your applications. Applozic makes provision for running on the cloud always available, continuously upgraded and auto-scaled to meet your needs.
Firebase Remote Config 33 Apps (17% of Top 200)

Firebase Remote Config is a cloud service that lets you change the appearance and behavior of your app without requiring users to download an app update. Firebase Remote Config is open source and let's you create in-app default values that control the behavior and appearance of your app with the potential to use the Firebase console or the Remote Config REST API to override in-app default values for all app users or for segments of your user base.
Xamarin 29 Apps (14% of Top 200)

Microsoft visual studiOS tool for building native user interfaces. Targets all platforms. Works on Windows and macOS