Observer Pro Downloads & RevenueObserver Pro · App Store
Observer Pro is #14 in Education Paid in India and charting in 1 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperJoshua Bury
CategoryEducation
Price12.99 GBP
Released
Rating★ 4.4 (7)
Version1.4.1
Age rating4+
First seen by us
3 Oct 2026
3 Oct 2026Installs (est.)5k+ worldwide
📈Entered the top 100📈Charting in a new country🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 11 events in the last 12 months
- 📈Observer Pro entered the top 100Top Paid · Education · IN
- 📈Observer Pro charting in a new countryIndia
- 📈Observer Pro charting in a new countryUnited States
- 📈Observer Pro entered the top 100Top Paid · Education · AU
- 📈Observer Pro charting in a new countryAustralia
- 📈Observer Pro charting in a new countrySpain
- 📈Observer Pro entered the top 100Top Paid · Education · CA
- 📈Observer Pro charting in a new countryCanada
- 📈Observer Pro entered the top 100Top Paid · Education · IT
- 🆕Observer Pro first spotted by AppInsider#73 in Top Paid · All Apps · Italy
- 🆕Observer Pro released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.4 ★
7 ratings
Measured
Best rank now
#14
Education PaidMeasured
Observer Pro on the App Store
App details
App ID
462392803
Publisher
Joshua Bury
On the store since
Sep 2011
15 years on the store
Minimum OS
iOS 16.4+
iPhone 8 and later
Devices
iPhone · iPad
Content rating
4+
Languages
1
EN
Size
253 MB
Also listed in
Utilities
Observer Pro downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| India | EducationPaid | #14 |
Apps near Observer Pro on the chart
Education Paid, around #14.
Ratings
App Store, worldwide.
Rating
4.4 ★
7 ratings
Measured
Ratings
7
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.4★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Education apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Observer Pro
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
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
Latest updates
1.4.1
• Basic support for importing and exporting lists of objects
• Fixed unable to change the sort mode of object type lists
• Fixed Observing List changes not always saved
• Other minor enhancements and fixes