# Planetary Weather vs Stars Units Sizes Objects

The clearest difference is in-app purchases: Stars Units Sizes Objects at none against Planetary Weather's 2. Stars Units Sizes Objects also leads on rating (4.2 vs 4.0). Planetary Weather's advantage is ads (none vs shown) and review sentiment (100% vs 80%). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. Planetary Weather sells 2 one-off in-app purchases. Stars Units Sizes Objects asks for nothing beyond the download.

Stars Units Sizes Objects holds the better App Store score, 4.2 against 4.0. Both are backed by a comparable volume of ratings — 11 and 5 respectively. Written reviews complicate that: 100% of Planetary Weather's written reviews are positive against 80% of Stars Units Sizes Objects's, so the app with the better star average is not the one people write more warmly about.

Planetary Weather ships an update every 7 months, Stars Units Sizes Objects every 4 months. The most recent releases landed on September 26, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Planetary Weather | Stars Units Sizes Objects |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (11 ratings)](https://appshunter.io/ios/app/planetary-weather/id862963045/reviews) | **[4.2 (5 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews)** |
| Number of ratings | **11** | 5 |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 118 MB | 124 MB |
| Requires iOS | **6.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Technospirits](https://appshunter.io/developer/379836863) | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) |

## What reviewers say

### Planetary Weather

[App page](https://appshunter.io/ios/app/planetary-weather/id862963045)

Explore real-time weather conditions on planets, moons, and the Sun in a stunning 3D solar system model. Get daily temperature and wind speed forecasts with accurate data.

**Highlights:** Daily temperature and wind speed forecasts, Data for planets, moons, and the Sun, Accurate estimates from NASA/NOAA, Stunning 3D solar system renders, Metric or Imperial units, High-quality graphics

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gas Giants | $0.99 | one-time |
| Moon Pack | $1.99 | one-time |


### Stars Units Sizes Objects

[App page](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571)

Explore the vastness of the universe, from the smallest particles to the largest cosmic structures. Compare object sizes, view detailed images, and perform unit conversions across a wide range of astronomical scales. Learn about stars, galaxies, and the incredible distances between them.

**Highlights:** Compare object sizes, View object images, Pinch/Zoom and Pan images, Unit conversion for distances, Explore scales from Planck length to observable universe, Learn about stars and galaxies

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Planetary Weather free?

Planetary Weather is free to download, with in-app purchases available.

### Is Stars Units Sizes Objects free?

Stars Units Sizes Objects is free to download, with no in-app purchases.

### Which has better reviews, Planetary Weather or Stars Units Sizes Objects?

Stars Units Sizes Objects is rated higher. Planetary Weather averages 4.0 out of 5 from 11 ratings, while Stars Units Sizes Objects averages 4.2 from 5 ratings.

### Do Planetary Weather or Stars Units Sizes Objects have ads?

Stars Units Sizes Objects shows ads; Planetary Weather does not.

### Which is updated more often, Planetary Weather or Stars Units Sizes Objects?

Planetary Weather ships an update every 7 months, and Stars Units Sizes Objects every 4 months. Most recently, Planetary Weather was updated on September 26, 2026 and Stars Units Sizes Objects on September 22, 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.*