Echo — Sealed Until Arrival

Some things are worth saying in a particular place. Echo lets you leave a message pinned to a spot on the map — a bench, a summit, a doorway — and seals it there. The person you left it for can see that something is waiting, but not what it says. The only key is being there. When they arrive, it opens. LEAVE ONE WHERE YOU ARE STANDING Stand at the place and tap once. Echo takes the spot from your phone's GPS, so the message is pinned to where your feet actually were, not to a guess on a map. Write what you would say if you were there, choose how close they have to get, and seal it. OR LEAVE A TRAIL OF THEM A trail is several places in order. Each stop carries a clue that leads to it and a message that opens on arrival — and the next clue only appears once the last one is found. Walk the route yourself, stamping each stop as you go. Good for a birthday, an anniversary, a city someone is…