Each Lumosity account must be tied to a unique email address. There is no way around this restriction.
Creating a new email address
You can create a new email address for free through providers like Gmail or Yahoo, then sign up for Lumosity using that new address. Or, if you are already using Gmail, you can create a Lumosity account with a variation of your email address.
Creating variations of your email address in Gmail
If you use Gmail, you can add "+" and some text to your email address when creating a new Lumosity account. Messages will go to your original email address, but you’ll be able to have multiple Lumosity accounts.
For example, suppose you have the email address firstname.lastname@example.org, and you share it with your spouse. If your spouse wants their own Lumosity account, they can use email@example.com or firstname.lastname@example.org. In this example, “jane” can be replaced with any text; just make sure to put it between the + and the @. Mail to any of these variations will go to email@example.com.
Using the same email on multiple devices
You should use the same Lumosity account every time you train, whether you train online, on a mobile device, or on a tablet. Just log into your existing account - using the same email address - on all devices. Your membership will sync across devices.