You tried the couples devotional. You got to day four. Cord asks each of you one private question during the day, then makes one short thing for both of you at night, built from both answers without revealing either.
Twenty seconds, on your own phone, during the day. Neither of you ever sees what the other wrote.
At night you get a passage and one question to ask each other, written from both of your answers. Somebody has to go first, and now nobody has to.
Once a month it names the theme you both kept returning to. Couples are often worried about the same thing and have not said so out loud.
For marriages that are fine and quiet. If yours is in crisis, you need a counsellor, and we will tell you that.