# Planetary Clock vs Univerzoom 3D

Planetary Clock and Univerzoom 3D both sit at 4.9 stars, but that hides the real split: 97% of Univerzoom 3D's written reviews are positive against 57% of Planetary Clock's. Univerzoom 3D also leads on update cadence (monthly vs every 27 months) and ratings volume (288 vs 34). Planetary Clock's advantage is price ($0.99 vs $2.99) and iOS requirement (11.4 vs 13.0). On rating, ads, in-app purchases and device support there is nothing between them.

Planetary Clock costs $0.99 and Univerzoom 3D $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Planetary Clock against 4.8 for Univerzoom 3D. That said, the two scores are not equally well evidenced: Univerzoom 3D has 288 ratings behind it against 34, so its average is the more settled of the two. Written reviews are what separate them: 57% of Planetary Clock's written reviews are positive against 97% of Univerzoom 3D's.

Planetary Clock ships an update every 27 months, Univerzoom 3D monthly. The most recent releases landed on August 19, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Planetary Clock | Univerzoom 3D |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | **[4.9 (34 ratings)](https://appshunter.io/ios/app/planetary-clock/id812876503/reviews)** | [4.8 (288 ratings)](https://appshunter.io/ios/app/univerzoom-3d-explore-scale/id1552648156/reviews) |
| Number of ratings | 34 | **288** |
| Positive reviews | 57.1% of reviews | **97.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 14 MB | 247 MB |
| Requires iOS | **11.4** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piotr Knapczyk](https://appshunter.io/developer/1541886746) | [Linda Schnetzinger](https://appshunter.io/developer/1479825448) |

## What reviewers say

### Planetary Clock

[App page](https://appshunter.io/ios/app/planetary-clock/id812876503)

Visualize the precise positions of all planets in the Solar System for any given day. It uses accurate NASA data for orbital calculations and relative planet sizing, offering a clear, educational view of celestial mechanics.

**Highlights:** Real-time planet positions, Accurate orbital calculations, Uses NASA data, Relative planet sizing, Educational solar system view

**Features:** macOS Compatibility

**In-app purchases:** none


### Univerzoom 3D

[App page](https://appshunter.io/ios/app/univerzoom-3d-explore-scale/id1552648156)

Explore the vastness of the universe and the intricacies of the microcosmos with intuitive touch controls. Compare celestial bodies, everyday objects, and subatomic particles to grasp their true scale. Discover fascinating facts and learn about the cosmos and beyond.

**Highlights:** Intuitive gesture-based scaling, Explore universe to atomic levels, Compare sizes of diverse objects, Learn facts about celestial bodies, Text-to-Speech for facts, External resource links

**In-app purchases:** none


## Frequently asked questions

### Is Planetary Clock free?

Planetary Clock costs $0.99, with no in-app purchases.

### Is Univerzoom 3D free?

Univerzoom 3D costs $2.99, with no in-app purchases.

### Which has better reviews, Planetary Clock or Univerzoom 3D?

Planetary Clock is rated higher. Planetary Clock averages 4.9 out of 5 from 34 ratings, while Univerzoom 3D averages 4.8 from 288 ratings.

### Do Planetary Clock or Univerzoom 3D have ads?

Neither Planetary Clock nor Univerzoom 3D shows ads.

### Which is updated more often, Planetary Clock or Univerzoom 3D?

Planetary Clock ships an update every 27 months, and Univerzoom 3D monthly. Most recently, Planetary Clock was updated on August 19, 2026 and Univerzoom 3D on September 27, 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.*