# Observer Pro vs Equal Earth

The clearest difference is update cadence: Equal Earth at monthly against Observer Pro's every 6 months. Equal Earth also leads on price ($8.99 vs $13.99) and device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

Observer Pro costs $13.99 and Equal Earth $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Observer Pro ships an update every 6 months, Equal Earth monthly. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Observer Pro | Equal Earth |
| --- | --- | --- |
| Price | $13.99 | **$8.99** |
| Rating | **[4.6 (49 ratings)](https://appshunter.io/ios/app/observer-pro/id462392803/reviews)** | — |
| Number of ratings | **49** | — |
| Positive reviews | 79.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Paid | — |
| Size | 241 MB | 8 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Joshua Bury](https://appshunter.io/developer/462392806) | [Nha HOANG](https://appshunter.io/developer/1061109666) |

## 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


### Equal Earth

[App page](https://appshunter.io/ios/app/equal-earth-world-map-studio/id6811352607)

**In-app purchases:** none


## Frequently asked questions

### Is Observer Pro free?

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

### Is Equal Earth free?

Equal Earth costs $8.99, with no in-app purchases.

### Do Observer Pro or Equal Earth have ads?

Neither Observer Pro nor Equal Earth shows ads.

### Which is updated more often, Observer Pro or Equal Earth?

Observer Pro ships an update every 6 months, and Equal Earth monthly. Most recently, Observer Pro was updated on October 29, 2026 and Equal Earth 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.*