TD Ameritrade Authenticator is a free iPhone app developed by TD Ameritrade Mobile LLC. It is designed to add an extra layer of security to TD Ameritrade accounts by allowing users to register their mobile devices and approve login requests through push notifications.

With TD Ameritrade Authenticator, users can easily set up their mobile devices to receive login approval requests. This helps to ensure that only authorized users can access their TD Ameritrade accounts. The app requires users to log in using their TD Ameritrade username and password, providing a seamless and secure experience.

By utilizing push notifications, TD Ameritrade Authenticator offers a convenient way for users to approve login requests on their registered devices. This adds an additional level of protection against unauthorized access and helps to safeguard sensitive financial information.

TD Ameritrade Authenticator is a valuable tool for TD Ameritrade users who prioritize security. It offers a simple and effective way to enhance the security of their accounts, providing peace of mind knowing that their financial information is well-protected.

Please note that this app is not available in certain jurisdictions, including Australia, Canada, Hong Kong, Japan, Saudi Arabia, Singapore, UK, and the countries of the European Union, where TD Ameritrade is not authorized to do business. It is important to comply with local laws and regulations when considering the use of this app.