# CelestialGuide vs The Earth Science Trivia

The clearest difference is update cadence: CelestialGuide at every 17 months against The Earth Science Trivia's every 37 months. CelestialGuide also leads on price ($0.99 vs $1.99). The Earth Science Trivia's advantage is iOS requirement (11.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

CelestialGuide costs $0.99 and The Earth Science Trivia $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CelestialGuide ships an update every 17 months, The Earth Science Trivia every 37 months. The most recent releases landed on June 10, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | CelestialGuide | The Earth Science Trivia |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/celestialguide/id649358382/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 17 months** | Every 37 months |
| Monetization | Paid | — |
| Size | 17 MB | 15 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Geoffrey Domm](https://appshunter.io/developer/373378724) | [Gulsen CAKIR](https://appshunter.io/developer/644171910) |

## What reviewers say

### CelestialGuide

[App page](https://appshunter.io/ios/app/celestialguide/id649358382)

Explore the cosmos with an interactive sky map that displays stars, planets, and celestial events. Point your device at the sky to see a real-time representation of your surroundings, with adjustable visibility settings for stars.

**Highlights:** Interactive sky map, Real-time celestial tracking, Adjustable star visibility, Planet and comet locations, Eclipse and transit rendering, Messier Object database, Virtual Orrery

**Features:** macOS Compatibility

**In-app purchases:** none


### The Earth Science Trivia

[App page](https://appshunter.io/ios/app/the-earth-science-trivia/id1479976385)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CelestialGuide free?

CelestialGuide costs $0.99, with no in-app purchases.

### Is The Earth Science Trivia free?

The Earth Science Trivia costs $1.99, with no in-app purchases.

### Do CelestialGuide or The Earth Science Trivia have ads?

Neither CelestialGuide nor The Earth Science Trivia shows ads.

### Which is updated more often, CelestialGuide or The Earth Science Trivia?

CelestialGuide ships an update every 17 months, and The Earth Science Trivia every 37 months. Most recently, CelestialGuide was updated on June 10, 2026 and The Earth Science Trivia on September 19, 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.*