# Observer Pro vs Singularity by Vaonis

The clearest difference is price: Singularity by Vaonis at Free against Observer Pro's $13.99. Singularity by Vaonis also leads on update cadence (every 5 weeks vs every 6 months) and device support (3 vs 1). Observer Pro's advantage is rating (4.6 vs 4.2) and review sentiment (79% vs 64%). On ratings volume, ads and in-app purchases there is nothing between them.

Singularity by Vaonis 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 4.2. Both are backed by a comparable volume of ratings — 49 and 73 respectively. Written reviews point the same way: 79% of Observer Pro's written reviews are positive against 64% of Singularity by Vaonis's.

Observer Pro ships an update every 6 months, Singularity by Vaonis every 5 weeks. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Observer Pro | Singularity by Vaonis |
| --- | --- | --- |
| Price | $13.99 | **Free** |
| Rating | **[4.6 (49 ratings)](https://appshunter.io/ios/app/observer-pro/id462392803/reviews)** | [4.2 (73 ratings)](https://appshunter.io/ios/app/singularity-by-vaonis/id1515280835/reviews) |
| Number of ratings | 49 | **73** |
| Positive reviews | **79.2% of reviews** | 64.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 241 MB | 401 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Joshua Bury](https://appshunter.io/developer/462392806) | [Vaonis](https://appshunter.io/developer/1369139518) |

## What reviewers say

### Observer Pro

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

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


### Singularity by Vaonis

[App page](https://appshunter.io/ios/app/singularity-by-vaonis/id1515280835)

Control your smart telescope to explore the cosmos. Discover celestial objects with personalized recommendations, capture stunning images of galaxies and nebulae, and share your astronomical journey.

**Highlights:** Automatic setup and alignment, Real-time image processing, Object catalog and coordinate pointing, Mosaic mode for wider views, Solar observation mode, Expert mode for advanced control, Night planning and automated exploration

**In-app purchases:** none


## Frequently asked questions

### Is Observer Pro free?

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

### Is Singularity by Vaonis free?

Singularity by Vaonis is free to download, with no in-app purchases.

### Which has better reviews, Observer Pro or Singularity by Vaonis?

Observer Pro is rated higher. Observer Pro averages 4.6 out of 5 from 49 ratings, while Singularity by Vaonis averages 4.2 from 73 ratings.

### Do Observer Pro or Singularity by Vaonis have ads?

Neither Observer Pro nor Singularity by Vaonis shows ads.

### Which is updated more often, Observer Pro or Singularity by Vaonis?

Observer Pro ships an update every 6 months, and Singularity by Vaonis every 5 weeks. Most recently, Observer Pro was updated on September 21, 2026 and Singularity by Vaonis on September 23, 2026.

---

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