# Triatlas

> Detailed and fast star chart for smartphones and tablets with millions of celestial objects. (iPhone/iPad app by DDQ.)

- Source: https://appshunter.io/ios/app/triatlas/id592681081 (this page in markdown: same URL + `.md`)
- Developer: [DDQ](https://appshunter.io/developer/418328467)
- Category: Education, Utilities
- Price: Free
- Rating: 4.80/5 from 15 App Store ratings · 20 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.1 · 465 MB
- Languages: enc
- Released: 2013-01-15
- Data updated: 2026-08-16
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/triatlas/id592681081/reviews.md

## What is Triatlas?

The Triatlas app contains the most detailed, speedy star chart available for smartphones and tablets!

- Stars up to mag 12.6
- Galaxies up to mag 15.5 (PGC). 37000 in total!
- 1200 planetary nebulae
- 1800 open clusters, all globulars
- Others: SH-2, RCW,LDN / Barnard 
- Double stars whose main star is brighter than 11th magnitude (35,000 double stars)
- Variable stars whose maximum reaches the 12.5 magnitude (29,000 variable stars)


PLUS:
- Flexible Night vision mode
- Landscape-portrait mode
- Flip and mirror (Supporting telescope orientation)
- Chart-to-chart navigation using the black corners.

Based on the charts made by Jose Torres. Used with permission.

## Key features

- Detailed star catalog (up to mag 12.6)
- Extensive galaxy and nebula data
- Support for clusters and double stars
- Flexible night vision mode
- Adjustable orientation controls (flip/mirror)
- Chart-to-chart navigation

## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/triatlas/id592681081/reviews.md

### 5/5 — Thank You!

*2024-03-31*

Thank you so much Jose R. Torres for creating these detailed and beautiful maps and making them available free. Also many thanks to Norbert Schmidt for developing this very useful app. 

The maps are very detailed and easy to use. I really appreciate the switch to red for night vision. Mostly though the fact that I can flip the map inverted for my Newtonian and flip right to left for my refactor or Maksutov telescopes is the best part. This enables me to duplicate the field I am seeing in the eyepiece and compare it with the map field. The fact that the maps are detailed enough makes this all work. 

The app works smoothly easily and is not glitchy making this a solid and dependable package I enjoy using with one of the most detailed star atlases available.

### 4/5 — 標準星図

*2018-09-23*

シンプル、スマート、洗練された機能と操作性がよくできている。全天恒星図であるとなおよい。

### 5/5 — Detailed star charts well presented

*2016-10-17*

This star atlas is based on the charts made by José Ramón Torres and Casey Skelton. It is a very welcome addition to my iPad. The presentation and use is simple and basic and that is good. I like the rotate and flip options and the navigation via the chart pointers. And there's a night-vision (red) mode. Great work!
vielen Dank, Hr. Schmidt

### 5/5 — Excellent App!

*2015-08-05*

The Triatlas is one of my favorite sky atlases. I like having the app so I only need to print the 50 or so pages of the "A" set, and I can access the other two sets when I am outside with my telescope. I really enjoy being able to turn the brightness way down and turn on red on black to preserve night vision. After using it, I tend to wait a while before starting a new sketch for my eyes to get rid of the faint light.

### 5/5 — TriAtlas

*2015-03-02*

Simply the best and greatest 'free' astronomy star chart download available on planet Earth, the Solar System, the universe...

### 5/5 — Liberating!

*2014-10-12*

A wonderful contribution to visual astronomy. Clear, detailed, accurate and user friendly under the stars with its red light background option, multiple rotation positions and easy moving between adjacent maps.

### 5/5 — WOW!!!

*2014-08-30*

Thank you for making this available....one more fact proving the people in power have and continue to keep knowledge hidden.

### 5/5 — Super

*2013-11-13*

Vraiment super ! très pratique !
Utile sur le terrain !

### 5/5 — Triatlas

*2013-08-05*

Excellent

### 5/5 — Impressive for the cost.

*2013-07-29*

Uranometria doesn't come close to comparing to this atlas. The only comparable hardcopy star atlas that I know of that compares is "The Great Atlas Of The Sky" at a cost of $250 or more.

## Frequently asked questions about Triatlas

### What celestial objects can I find in Triatlas?

Triatlas displays stars up to magnitude 12.6, galaxies up to magnitude 15.5 (37,000 PGC), 1200 planetary nebulae, all globular clusters, 1800 open clusters, and various other deep-sky objects like SH-2, RCW, LDN, and Barnard objects. It also includes double stars and variable stars with specific magnitude limits.

### What are the customization options for viewing in Triatlas?

Triatlas offers a flexible night vision mode to preserve your night vision. It also supports landscape and portrait orientations, and includes flip and mirror functions to match telescope orientation.

### How does Triatlas compare to other stargazing apps?

Triatlas is noted for its detailed and speedy star chart, featuring a vast catalog of celestial objects. Its specific data points on magnitude limits for stars, galaxies, and nebulae offer a high level of detail for enthusiasts.

### Is Triatlas suitable for beginners in astronomy?

While Triatlas provides extensive data, its detailed catalog may be best appreciated by users with some existing knowledge of astronomy. The intuitive navigation and customizable viewing modes can still be beneficial for learning.

### What devices does Triatlas support?

Triatlas is available for iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users interested in astronomy.

### How often is Triatlas updated?

The latest version of Triatlas was released on March 2, 2015. While the app has not been updated recently, its comprehensive data remains a valuable resource for stargazing.

### What is the user rating for Triatlas?

Triatlas has an excellent rating of 4.8 stars based on 16 user reviews, indicating a highly positive user experience and satisfaction with the app's features.

### Does Triatlas have ads?

No, Triatlas does not contain advertisements. It is a completely free application without any in-app purchases or ad interruptions.

## Version history (last 3 releases)

### 1.2.1 — 2015-03-02

This app has been updated by Apple to display the Apple Watch app icon.

iOS 8 ready
UI optimizations

### 1.1 — 2013-01-22

iPad layout!

### 1 — 2013-01-15

No release notes.

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All apps by DDQ: https://appshunter.io/developer/418328467

## Related topics

[free star app chart](https://appshunter.io/ios/topics/free-star-app-chart)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*