Picture a family in New Jersey who already speak two languages at home. One parent has rusty French from college, and they would love their child to pick up another language too. They have tried apps before, and the habit faded after a few months.
What could make the difference for a family like this is people rather than streaks: tutors who know each of them, sessions that fit around school and work, and a child who is taught as a real student, at a child's pace.
A family like this might keep a couple of dinners a week in French, or end the day with a few songs in their child's new language. Progress would look different for each person, and that is fine. The shared habit is the point.