The ultimate astronomy planner for iPhone and iPod touch!
Available on the App Store

Observer Pro - Astronomy Planner for iPhone and iPod touch

Observer Pro is a groundbreaking app for advanced astronomy planning. No more guessing when that galaxy emerges from behind that pesky tree. No more estimating how many hours you'll be able to image an object. Observer Pro gives every astronomer the info they need right at their fingertips (even if you're not a Certified Astro Geek). You won't know how you did astronomy without it!

What astronomers are saying

"Every astronomer with an iPhone should own this app!"

- Astronomy Technology Today magazine (read review)

"Observer Pro is the most impressive astronomy app that I have tried out. I enthusiastically commend it to you!"

- Tom Mote, Professor Emeritus, Astronomy

"I have been using it since the day it first became available and I cannot live without it now."

- Sedat B., Cloudy Nights forum

"This thing is a dream. Best $10 I ever spent."

- Michael M., Cloudy Nights forum

Get the info you need

Observer Pro gives you the information you need in an easy to digest visual format. Use the simple interface to painlessly plan your observing and imaging. Easily search through hundreds of potential objects to figure out exactly how you want to spend your time at the eyepiece.



Complete Visibility Outlook

Find the best time to observe any object. Plan for tonight, next week, or three months from now. Observer Pro can use your local horizon to give you the most accurate picture of object visibility. Compare multiple Observing Sites to determine the best spot to setup your scope.

Browse Reference Photos

Reference photos are included for all 14,000 objects in Observer Pro. No downloads necessary! Object catalog includes complete NGC and IC catalogs.



Measure Your Horizon in Minutes

Use your iPhone 4 to measure your local horizon. All visibility charts and calculations factor in your actual horizon. Take all the guesswork out of planning your observing. Get the most out of your imaging time.

View a Unique Sky Map and a Convenient Finder Chart

Easily view when and where an object's visibility will be best in your sky. The Sky Map shows you where the object is amongst the stars, and also visualizes where the object will be in your sky. View a close-up Finder Chart to help locate faint targets.


Observer Pro has a simple interface that makes all these powerful features readily accessible. Check it out now on the App Store.

  • Complete NGC/IC catalogs with a reference photo for every object included
  • Sophisticated visibility charts for the next 24 hours, month, year, and unique sky map
  • Measure your local horizon with your iPhone* or import horizon data
  • Compare observing sites to find the best spot to setup
  • Popular Observations list shows trending observations
  • Sort and filter catalogs for more focused browsing
  • Sky Map and Finder Chart to help locate objects without a go-to scope
  • Astronomy weather forcast
  • Favorites List to collect your favorite DSOs
  • Observing List for planning what to observe next
  • Observing History so you can look back on what you've seen
  • Red screen night mode for use at the eyepiece

* Device with magnetometer and gyroscope required for horizon measurement.