# Observer Pro vs Universe2Go

The clearest difference is review sentiment: Observer Pro at 79% against Universe2Go's 26%. Observer Pro also leads on rating (4.6 vs 3.5) and ratings volume (49 vs 2). Universe2Go's advantage is price (Free vs $13.99) and update cadence (every 2 months vs every 6 months). On ads and in-app purchases there is nothing between them.

Universe2Go is free to download; Observer Pro costs $13.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Observer Pro holds the better App Store score, 4.6 against 3.5. That said, the two scores are not equally well evidenced: Observer Pro has 49 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 79% of Observer Pro's written reviews are positive against 26% of Universe2Go's.

Observer Pro ships an update every 6 months, Universe2Go every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Observer Pro | Universe2Go |
| --- | --- | --- |
| Price | $13.99 | **Free** |
| Rating | **[4.6 (49 ratings)](https://appshunter.io/ios/app/observer-pro/id462392803/reviews)** | [3.5 (2 ratings)](https://appshunter.io/ios/app/universe2go-german/id942711994/reviews) |
| Number of ratings | **49** | 2 |
| Positive reviews | **79.2% of reviews** | 26.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#153** | — |
| Size | 241 MB | 298 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Joshua Bury](https://appshunter.io/developer/462392806) | [innospiring GmbH](https://appshunter.io/developer/498780250) |

## What reviewers say

### Observer Pro

[App page](https://appshunter.io/ios/app/observer-pro/id462392803)

**Currently charting:** #153 Top Paid · Education (US App Store)

This app helps advanced astronomers and astrophotographers plan their observing sessions. It predicts object visibility, factoring in local obstructions, and provides weather forecasts. Manage observing lists and favorite sites to maximize your stargazing time.

**Highlights:** 14,000+ deep sky objects with photos, Local horizon profile measurement, Object visibility prediction charts, Featured object recommendations, Favorite observing site management, Astronomical weather forecasts

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🎯 Excellent target planning and visibility forecasting
- 🌍 Custom horizon mapping feature is intuitive and unique
- 📊 Comprehensive visualization graphs and charts
- 🔍 Extensive DSO catalog with detailed object information
- 📸 Offline object images included

**What reviewers complain about**

- 🐛 Crashes when selecting catalog groupings (recent)
- 🐛 Keyboard doesn't dismiss after input (iPad issue)
- 🐛 Data loss - observer lists disappearing
- 🐛 Search function missing in recent version
- ⏱️ Lack of developer updates for extended periods

**Reported bugs**

- App crashes when selecting catalog groupings (Galaxy, Planetary Nebulae, etc.)
- iOS keyboard doesn't dismiss on iPad after clicking Done
- Observer lists and custom data disappearing after app closure
- Search feature missing in version 1.4
- Continuous crashes since recent updates

**Requested features**

- iPad native app with landscape mode support
- Search functionality restoration/improvement
- Export observer lists to other apps (Sky Safari, etc.)
- Support for planets, comets, and asteroids
- Observing notes and session logging


### Universe2Go

[App page](https://appshunter.io/ios/app/universe2go-german/id942711994)

Explore the night sky with an audio-visual guide. Use augmented reality with special glasses to overlay information onto the real stars, or use starmap mode for a limited experience. Features include constellation discovery, mythology stories, deep-sky object exploration, and quizzes.

**Highlights:** Augmented reality overlay, Audio-visual sky guide, Constellation discovery mode, Mythology stories, Deep-sky object exploration, Night sky quiz mode

**In-app purchases:** none


## Frequently asked questions

### Is Observer Pro free?

Observer Pro costs $13.99, with no in-app purchases.

### Is Universe2Go free?

Universe2Go is free to download, with no in-app purchases.

### Which has better reviews, Observer Pro or Universe2Go?

Observer Pro is rated higher. Observer Pro averages 4.6 out of 5 from 49 ratings, while Universe2Go averages 3.5 from 2 ratings.

### Do Observer Pro or Universe2Go have ads?

Neither Observer Pro nor Universe2Go shows ads.

### Which is updated more often, Observer Pro or Universe2Go?

Observer Pro ships an update every 6 months, and Universe2Go every 2 months. Most recently, Observer Pro was updated on October 24, 2026 and Universe2Go on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*