Observer Pro

Name: Observer Pro
Price: 13.99 USD
Rating: 4.6 (49 reviews)
Author: Joshua Bury

By: Joshua Bury

Deep sky astronomy planner

Features & Capabilities

Observer Pro is an indispensable app for advanced astronomy observing and astrophotography planning. No more guessing when that galaxy emerges from behind that tree. No more estimating how many hours you'll be able to image an object. Observer Pro gives every astronomer the info they need to make the most of their observing right at their fingertips!

What astronomers are saying:

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

Astronomy Technology Today magazine

"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

Feature highlights:

• Over 14,000 deep sky objects included, all with closeup reference photos. No need to download anything after install! Sorting and search make it easy to sift through all of them to find which objects belong on your observing list.

• Measure your local horizon profile in minutes with your iPhone.

• Unique charts completely take the guesswork out of predicting object visibility. Your house, trees, mountains, or any other obstructions are completely factored in to all visibility charts.

• New to astronomy? The Featured object list shows a list of objects specific to your location and local horizon that are great for observing right now.

• Keep a list of your favorite observing sites, each with their own local horizon profile. Compare object visibility between sites to find the best spot to setup your scope.

• There's a lot to observe! Observer Pro gives you a place to maintain a list of your favorite objects as well as an observing list that you can take with you to the eyepiece.

• 7Timer! astronomical weather forecasts for your observing sites are viewable without leaving Observer Pro. They give you the outlook on cloud cover, seeing, transparency, and more.

• Check out the in-app help to learn more about how to use the many features that come with Observer Pro.

Keep up-to-date with the latest news at the Observer Pro blog: http://observer.pro/blog

User Growth & Download Statistics

App

By:

Joshua Bury

Rating:

4.60

(49)

Version:

1.4.1 Last updated: 2025-03-25

Version code:

873500018

Creation date:

2011-09-16

Compatible devices:

Size:

241.12MB

Price:

13.99

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-03

Compare stats and ranking:

Ranking

# 196,696 ▼ 708

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Joshua Bury

Apple Apps Store

https://apps.apple.com/us/app/observer-pro/id462392803

Website:

http://observer.pro

User Reviews

ObserverPro is a powerful planning tool for amateur astronomy, widely praised for helping users plan observing sessions around site-specific horizons, obstructions, and timing windows. Reviewers highlight its custom horizon tracing, clear visibility graphs, and the ability to compare multiple sites to pick the best location. Common concerns relate to maintenance and platform support: infrequent updates, limited iPad support, and catalog search issues.

Pros

Powerful planning tool for observing, with precise target visibility windows and session timing.
Supports custom horizon tracing and site-specific obstruction profiles across multiple locations.
Clear graphs and data showing when targets are visible and for how long, aiding target selection and timing.
Ability to compare different observing sites to pick the best location and time for a session.

Cons

Not updated or maintained for years, raising concerns about bugs and compatibility.
Limited iPad support (no landscape mode and suboptimal iPad experience; no native iPad version).
Catalog search is missing or hard to use in recent versions, reducing quick access to objects.

Recent reviews

I’ve used ObserverPro for years now to determine which imaging targets are feasible from my location and optimal imaging months for each one. Love it!

by NH*****, 2026-04-04

Thank you so much for fixing the sort functions.. This is absolutely my favorite planning app.

by Bf*****, 2025-04-02

I liked the look of this, and I was interested in the custom horizon capability, so I drew my boundary and made an observer list of things that would be visible tonight from my backyard. However, when I came back this evening to look, the observer list was gone. Losing data is hard to excuse (I’m a retired programmer). Additionally, I imagined there would be a way to export the list so that I could load it in Sky Safari and use it to drive my scope, but I don’t see that. Kevin