Add another device for spouse

When adding my wife’s phone as a device, do we use the main log in on her phone also when she downloads the app or does she create another log in?

Hi! 

Yes, you can surely add your wife's mobile device by using your main login. Just download the app and choose "sign-in using your Trend Micro Account". 

Good question! If you're trying to link her phone to the same account (like for a smart home app or a security system), she should usually log in with the same main account you used — that way both devices stay synced.

You can use your main Trend Micro login on her phone when she downloads/install the app — there’s no need to create a separate account.@ block blast

Does it cost extra to put Trend Micro Mobile Security on my husbands iPhone when I already have it on my iPhone?