Name: Lightime
Rating: 5 (1 reviews)
Author: JuliensLab

Ever wondered how long it will take your kids to get your email once they settled on Mars? This app helps you know how long it takes for information to travel between the Earth and other planets. That includes the Tesla Roadster sent in 2018 by a Falcon Heavy on a heliocentric orbit.

DISTANCE AND VELOCITY OF SELECTED PLANET RELATIVE TO THE EARTH.

Upon widget launch, the last planet selected is shown. Light time is displayed in the center. Below are displayed the distances in km or miles (million) and in AU (astronomical units, which is the average sun-earth distance of about 150 million km). 
Press select to enter selection mode. You can select the planet by clicking up/down.
Press select again to switch to date mode. You can select the date offset (currently by 1 day per click up/down).
Press menu button to revert to now.