We are about to develop a notification solution using Google FCM. The customer deploys Android mobile to the users which are highly guarded, and they require that the use of our solution does not enforce them to create Google accounts. Will that be easy to promise ?
You can use Firebase Authentication to allow users to sign in to your app using one or more sign-in methods, including email address and password sign-in, and federated identity providers such as Google Sign-in and Facebook Login.
Firebase Authentication works across Android, iOS and the web making it a great choice when you think your user is likely to be accessing your app across different devices.
Firebase offers a no-cost tier pricing plan for all its products. For some products, usage continues at no cost no matter your level of use. For other products, if you need high levels of use, you'll need to switch your project to a paid-tier pricing plan.
Google today announced that it has acquired Firebase, a backend service that helps developers build realtime apps for iOS, Android and the web that can store and sync data instantly.
Using Firebase requires that you as the developer have a Google account.
But your app's users don't need to have a Google account, unless you want them to.
In fact, if you don't use Firebase Authentication, you can work with completely unidentified users for most services. Firebase Cloud Messaging for example doesn't require users to be signed in.
But you could use Firebase Authentication's anonymous authentication, to have anonymous-but-identified users. With anonymous authentication you don't know who the user is, but you can still know if the same user is returning.
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