YES, however we do not recommend to rely only on Logintap. For example, if users loose control of a mobile device for a while, entering the account would be impossible. So we recommend having email or a phone number on your side as a login, at the very least.
Also, you need to consider that Logintap is fully anonymous. Meaning your will not get any information from us on user identity, social profiles, emails, etc. Thus if SSO signup is a part of your marketing, we recommend FIRST - use SSO to register a user, SECOND - use Logintap to make access more secure and convenient.