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Top 20 User Authentication SDKs Used in iOS Apps on the Apple App Store
Last update: 22 Jan 2025 CET
App Store

Top 20 User Authentication SDKs Used in iOS Apps on the Apple App Store

We at 42matters have identified the 20 most popular User Authentication SDKs leveraged by iOS apps available on the iOS app market.

User Authentication SDKs enable developers to add user authentication capabilities, such as login, registration, and access control, to their mobile apps. They commonly offer user management, identity verification, password reset, and other related capabilities.

This list is based on our analysis of the millions of mobile applications – and the 2,300+ SDKs they use – that constitute the vast inventory of the Apple App Store. The accompanying data provides readers with a glimpse into the rich mobile application insights generated by the 42matters technology. This data is also available via our APIs, file dumps, Explorer, and SDK Explorer.

The intended purpose of this article is to assist app builders in their search for the perfect User Authentication SDK to leverage in their app, as well as to give SDK developers insight into their biggest competitors and potential customers. This data collected by our technology may also serve as a useful tool for folks researching the wider mobile app market.

Among all apps utilizing user authentication SDKs, 45.02% have integrated Apple Accounts. This accounts for 36.79% of app downloads within the user authentication SDK category.

Total Apps
183.89k
App Store
App Share
45.02%
App Store
Apps
149.31k
Games
34.58k
Total Downloads
72.76b
App Store
Download Share
36.79%
App Store
App Downloads
49.93b
Game Downloads
22.83b

Use the 42matters SDK Explorer to find all apps that use Apple Accounts.

Among all apps utilizing user authentication SDKs, 44.25% have integrated AppAuth by OpenID. This accounts for 49.06% of app downloads within the user authentication SDK category.

AppAuth for Android is a client SDK for communicating with OAuth 2.0 and OpenID Connect providers. It strives to directly map the requests and responses of those specifications, while following the idiomatic style of the implementation language.

Total Apps
180.72k
App Store
App Share
44.25%
App Store
Apps
175.28k
Games
5.44k
Total Downloads
97.02b
App Store
Download Share
49.06%
App Store
App Downloads
88.74b
Game Downloads
8.28b

Use the 42matters SDK Explorer to find all apps that use AppAuth by OpenID.

Among all apps utilizing user authentication SDKs, 38.07% have integrated Firebase Authentication. This accounts for 20.44% of app downloads within the user authentication SDK category.

Total Apps
155.48k
App Store
App Share
38.07%
App Store
Apps
145.50k
Games
9.99k
Total Downloads
40.43b
App Store
Download Share
20.44%
App Store
App Downloads
30.47b
Game Downloads
9.96b

Use the 42matters SDK Explorer to find all apps that use Firebase Authentication.

Among all apps utilizing user authentication SDKs, 8.79% have integrated Google reCAPTCHA. This accounts for 9.85% of app downloads within the user authentication SDK category.

Total Apps
35.92k
App Store
App Share
8.79%
App Store
Apps
33.82k
Games
2.10k
Total Downloads
19.47b
App Store
Download Share
9.85%
App Store
App Downloads
13.16b
Game Downloads
6.32b

Use the 42matters SDK Explorer to find all apps that use Google reCAPTCHA.

Among all apps utilizing user authentication SDKs, 3.50% have integrated Amazon AWS Cognito Federated Identities. This accounts for 3.31% of app downloads within the user authentication SDK category.

Total Apps
14.29k
App Store
App Share
3.50%
App Store
Apps
13.88k
Games
413
Total Downloads
6.55b
App Store
Download Share
3.31%
App Store
App Downloads
4.38b
Game Downloads
2.17b

Use the 42matters SDK Explorer to find all apps that use Amazon AWS Cognito Federated Identities.

Among all apps utilizing user authentication SDKs, 1.30% have integrated Mitek MiSnap. This accounts for 2.15% of app downloads within the user authentication SDK category.

Mitek MiSnap is a patented mobile capture SDK that enables an intuitive user experience and instant capture of quality images.

Total Apps
5.32k
App Store
App Share
1.30%
App Store
Apps
5.32k
Games
0
Total Downloads
4.26b
App Store
Download Share
2.15%
App Store
App Downloads
4.26b
Game Downloads
343

Use the 42matters SDK Explorer to find all apps that use Mitek MiSnap.

Among all apps utilizing user authentication SDKs, 1.16% have integrated OAuthSwift. This accounts for <1% of app downloads within the user authentication SDK category.

OAuthSwift is a Swift-based OAuth library SDK for iOS and macOS.

Total Apps
4.72k
App Store
App Share
1.16%
App Store
Apps
4.72k
Games
6
Total Downloads
618.32m
App Store
Download Share
<1%
App Store
App Downloads
585.83m
Game Downloads
32.49m

Use the 42matters SDK Explorer to find all apps that use OAuthSwift.

Among all apps utilizing user authentication SDKs, 1.00% have integrated FCUUID. This accounts for 1.24% of app downloads within the user authentication SDK category.

FCUUID is an iOS UUID library SDK and an alternative to UDID and identifierForVendor. This library provides the simplest API to obtain universally unique identifiers with different levels of persistence.

Total Apps
4.10k
App Store
App Share
1.00%
App Store
Apps
3.92k
Games
179
Total Downloads
2.46b
App Store
Download Share
1.24%
App Store
App Downloads
2.21b
Game Downloads
247.29m

Use the 42matters SDK Explorer to find all apps that use FCUUID.

Among all apps utilizing user authentication SDKs, 1.00% have integrated Microsoft Authentication Library. This accounts for 2.66% of app downloads within the user authentication SDK category.

Total Apps
4.10k
App Store
App Share
1.00%
App Store
Apps
4.08k
Games
15
Total Downloads
5.27b
App Store
Download Share
2.66%
App Store
App Downloads
5.27b
Game Downloads
2.80m

Use the 42matters SDK Explorer to find all apps that use Microsoft Authentication Library.

Among all apps utilizing user authentication SDKs, <1% have integrated Auth0. This accounts for <1% of app downloads within the user authentication SDK category.

Auth0 is an easy to implement, adaptable authentication and authorization platform. They make your login box awesome.

Total Apps
3.44k
App Store
App Share
<1%
App Store
Apps
3.43k
Games
7
Total Downloads
1.26b
App Store
Download Share
<1%
App Store
App Downloads
1.26b
Game Downloads
4.43m

Use the 42matters SDK Explorer to find all apps that use Auth0.

Among all apps utilizing user authentication SDKs, <1% have integrated FraudForce by iovation. This accounts for 2.31% of app downloads within the user authentication SDK category.

Total Apps
2.37k
App Store
App Share
<1%
App Store
Apps
2.36k
Games
16
Total Downloads
4.58b
App Store
Download Share
2.31%
App Store
App Downloads
4.57b
Game Downloads
5.91m

Use the 42matters SDK Explorer to find all apps that use FraudForce by iovation.

Among all apps utilizing user authentication SDKs, <1% have integrated OTPless. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
1.84k
App Store
App Share
<1%
App Store
Apps
1.83k
Games
7
Total Downloads
540.13m
App Store
Download Share
<1%
App Store
App Downloads
534.60m
Game Downloads
5.53m

Use the 42matters SDK Explorer to find all apps that use OTPless.

Among all apps utilizing user authentication SDKs, <1% have integrated Kount by Equifax. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
1.23k
App Store
App Share
<1%
App Store
Apps
1.22k
Games
7
Total Downloads
893.50m
App Store
Download Share
<1%
App Store
App Downloads
893.36m
Game Downloads
134.68k

Use the 42matters SDK Explorer to find all apps that use Kount by Equifax.

Among all apps utilizing user authentication SDKs, <1% have integrated Sinch. This accounts for <1% of app downloads within the user authentication SDK category.

Sinch is an SDK that enables developers to connect with customers and make engagement personal with simple, programmable SMS, voice, video, and verification tools.

Total Apps
1.05k
App Store
App Share
<1%
App Store
Apps
1.05k
Games
1
Total Downloads
306.14m
App Store
Download Share
<1%
App Store
App Downloads
306.13m
Game Downloads
10.31k

Use the 42matters SDK Explorer to find all apps that use Sinch.

Among all apps utilizing user authentication SDKs, <1% have integrated SumSub. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
806
App Store
App Share
<1%
App Store
Apps
765
Games
41
Total Downloads
788.37m
App Store
Download Share
<1%
App Store
App Downloads
628.42m
Game Downloads
159.95m

Use the 42matters SDK Explorer to find all apps that use SumSub.

Among all apps utilizing user authentication SDKs, <1% have integrated Onfido Capture. This accounts for <1% of app downloads within the user authentication SDK category.

The Onfido Capture SDK is an AI-based technology that assesses whether a user’s government-issued ID is genuine or fraudulent. It then compares it against their facial biometrics.

Total Apps
692
App Store
App Share
<1%
App Store
Apps
672
Games
20
Total Downloads
1.94b
App Store
Download Share
<1%
App Store
App Downloads
1.92b
Game Downloads
27.57m

Use the 42matters SDK Explorer to find all apps that use Onfido Capture.

Among all apps utilizing user authentication SDKs, <1% have integrated Facetec. This accounts for 2.64% of app downloads within the user authentication SDK category.

Total Apps
651
App Store
App Share
<1%
App Store
Apps
645
Games
6
Total Downloads
5.22b
App Store
Download Share
2.64%
App Store
App Downloads
5.21b
Game Downloads
6.57m

Use the 42matters SDK Explorer to find all apps that use Facetec.

Among all apps utilizing user authentication SDKs, <1% have integrated Truecaller. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
634
App Store
App Share
<1%
App Store
Apps
625
Games
9
Total Downloads
687.00m
App Store
Download Share
<1%
App Store
App Downloads
670.70m
Game Downloads
16.31m

Use the 42matters SDK Explorer to find all apps that use Truecaller.

Among all apps utilizing user authentication SDKs, <1% have integrated iProov. This accounts for <1% of app downloads within the user authentication SDK category.

Total Apps
602
App Store
App Share
<1%
App Store
Apps
598
Games
4
Total Downloads
1.60b
App Store
Download Share
<1%
App Store
App Downloads
1.60b
Game Downloads
560.24k

Use the 42matters SDK Explorer to find all apps that use iProov.

Browse iOS and Android SDKs With the SDK Explorer

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    See how many apps integrate specific SDKs, how many times these SDKs have been downloaded, developer details, similar SDKs, and more.

  • New Installations and Removals HistoryNew Installations and Removals History

    Analyze installation and removal trends for SDKs. Discover which apps have removed or integrated specific SDKs in a given timeframe.

  • Market Share per Google Play and Apple App Store CategoryMarket Share per Google Play and Apple App Store Category

    See which app categories or genres are most likely to use specific SDKs. Detect SDK market share per category.

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Frequently Asked Questions (FAQs)

How does 42matters collect this data?'

We’ve developed a number of machine learning algorithms that scan millions of mobile and connected TV (CTV) applications on a regular basis. In addition, we collect ground truth app performance intelligence and use this data to build statistical models that estimate the performance of apps for which we do not have ground truth data.

What SDK data does 42matters collect?'

We track over 2,300 of the most popular SDKs integrated in iOS and Android apps. We collect a variety of SDK insights (title, platform, ID, category, and developer website); performance metrics (the number of apps that have installed each SDK, installation and removal trends, and app downloads); market share statistics (including market share per app category); and more!

How can I access 42matters’ SDK data?'

The most direct way is to use our SDK Explorer, which is a visual, web-based research platform that enables you to peruse all 2,300+ SDKs that we track. It’s great for market research, lead generation, competitor analysis, etc. However, more technically-inclined folks might prefer our APIs and File Dumps, which enable you to query info for specific apps or SDKs. You can also use our other research platform (the Explorer) to view integrated SDKs by app.

Can I use 42matters’ solutions to generate app publisher leads?'

Absolutely! We actually wrote about this on our blog. We focused on ad network SDKs, but the examples are applicable to most SDK types. To summarize, you can use the Explorer’s advanced filtering capabilities to home in on best-fit app publishers, leverage the SDK Explorer to see which apps use your competitors’ SDKs, and use our APIs and file dumps to build custom lead generation processes.

What data does 42matters provide on mobile apps?'

A ton! We track 17+ million apps across Google Play, the Apple App Store, Amazon Appstore, Tencent Appstore, and Huawei AppGallery. Our solutions provide access to app details (developer insights, metadata, ASO keywords, contact information, etc.); performance metrics (downloads, MAUs, ratings, reviews, top chart rankings, etc.); technical insights (integrated SDKs, permissions, required capabilities, etc.); content details (categories, genres, IAB categories, content ratings, etc.); compliance information (app-ads.txt, privacy policies, store status, etc.) and much, much more!

Can I use 42matters’ solutions to find SDKs for my app?'

Definitely. The SDK Explorer enables you to sort SDKs by category, identify similar SDKs, analyze SDK reliability, and more. In addition, you can use the Explorer to monitor your competitors, including which SDKs they add and remove, their current tech stacks, and SDK changelogs. This means you use our solutions not only to find the right SDK for a particular purpose, but also which SDKs you might need to keep up with your rivals.