My daughter just rented an apartment with ceramic tiles in the
kitchen, down a hallway & in the bathroom.

I recommended she get some grout sealer for it now that she's gotten
it clean. [price of 'cheap' apartment]

Is there a superior sealer for either/both areas?

I've got tile in my bathroom and sealed it 20 years ago- and it has
held up fine- but there is little traffic in there.

Jim