Disclosed are systems, methods, and non-transitory computer-readable storage media for setting a reminder triggered by a target device. A requesting device sends a request to a server to set a reminder triggered by a target device. The request includes parameters, such as a location and a condition that define when the reminder is triggered. The server sends instruction to the target device to set the reminder based on the parameters. When the condition such as arrival is met by the target device in relation to the location the target device sends a message to the server that the reminder has been triggered. The target device can set a geo-fence to determine the position of the target device in relation to the location, and the requesting user can dictate the size of the geo-fence. The server sends a notification to the requesting device that the reminder has been triggered.