Most calendars tell you when an activity starts. Mairim tells you when to leave. It works out the drive time from traffic, adds your safety margin and counts down to your departure. Each parent's phone alerts only the trips that are theirs (drop-off or pick-up), and one shared calendar shows the whole family, color-coded by parent. Android, in English, Italian, French and Spanish, currently available in Europe. Free, with optional Premium and Family plans.