Authentication SDKs in Top 200 Free android Apps

Google Identity 173 Apps (87% of Top 200)

Google Auth 115 Apps (57% of Top 200)

Firebase Auth 19 Apps (10% 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.

Facebook Conceal 11 Apps (6% of Top 200)

Conceal provides a set of Java APIs to perform cryptography on Android. Conceal was designed to be able to encrypt large files on disk in a fast and memory efficient manner. The major target for this project is typical Android devices which run old Android versions, have low memory and slower processors.

Iovation 9 Apps (5% of Top 200)

Login With Amazon 8 Apps (4% of Top 200)

login-with-amazon-sdk lets customers log in to your site or app in just a few clicks using their Amazon accounts. With login-with-amazon-sdk, you can leverage a brand customers trust while getting data like name, email address, and zip code to build a more personalized experience.

Iovation FraudForce 6 Apps (3% of Top 200)

Mitek 5 Apps (3% of Top 200)

Kount 4 Apps (2% of Top 200)

Gigya 1 Apps (1% of Top 200)

Truecaller 1 Apps (1% of Top 200)

Facebook AccountKit 1 Apps (1% of Top 200)

Account Kit lets people quickly register for and login to your app by using just their phone number or email address — no password needed. Account Kit is reliable, easy to use and gives you a choice about how you sign up for apps.