Can't google how to get after date in SQLite?

Question

SQLite

Kind
In the Table there is a column with a date of type string, the record looks like this "2018-05-01", so, I need to find the latest date
, that's what I wrote, but alas

"Select date_write FROM title_product WHERE date_write = (SELECT max(date_write) from title_product)"

android application throws an error with such a request.