MeasureShooting vs Astro Locator

By entering the height of the target, to shoot under point and the top point, this app is an application which you want to measure the distance. 
 On the other hand, it is also possible to measure the height by entering the distance to the object, to shoot in the same way. It is also possible to view enlarged at the time of imaging. If in a state where the target is obliquely, is its diagonal length (not height) is known, that it be taken to tilt (iPad) iPhone, little, precision you will be able to increase.

Spend less time setting up and more time observing. Astro Locator helps you quickly and accurately polar align your equatorial mount by showing the precise position of Polaris or Sigma Octantis. Designed for both visual astronomy and astrophotography, it makes polar alignment fast, simple and reliable wherever you observe. Whether you’re setting up in your garden or under dark skies, Astro Locator provides all the information you need on a single, easy-to-read screen. Features include: • Accurate Polaris and Sigma Octantis positioning • Compass direction and correct elevation for your location • Latitude, longitude and altitude • UTC and local time • Sunrise and sunset times • Astronomical twilight start and end times • Current moon phase • Clean, uncluttered interface designed for fast setup Astro Locator is ideal for astronomers who assemble and pack away their equipment for each observing session, helping you spend less time setting up and more time enjoying the night sky. Trusted by amateur astronomers since 2014.