# Stars Units Sizes Objects vs FractalEcho

The clearest difference is in-app purchases: Stars Units Sizes Objects at none against FractalEcho's 3. Stars Units Sizes Objects also leads on rating (4.3 vs 3.9) and iOS requirement (11.0 vs 17.6). FractalEcho's advantage is ads (none vs shown) and update cadence (fortnightly vs every 4 months). On price, review sentiment, ratings volume and device support there is nothing between them.

Both are free to download. FractalEcho sells 3 in-app purchases, starting at $1.99 per month. Stars Units Sizes Objects asks for nothing beyond the download.

Stars Units Sizes Objects holds the better App Store score, 4.3 against 3.9. Both are backed by a comparable volume of ratings — 6 and 10 respectively. Written reviews split almost evenly too, at 80% and 80% positive.

Stars Units Sizes Objects ships an update every 4 months, FractalEcho fortnightly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Stars Units Sizes Objects | FractalEcho |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/stars-units-sizes-objects/id1576148571/reviews)** | [3.9 (10 ratings)](https://appshunter.io/ios/app/fractalecho/id6473468070/reviews) |
| Number of ratings | 6 | **10** |
| Positive reviews | 80.0% of reviews | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | **Ad-supported** | Freemium |
| Size | 124 MB | 138 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Mudarmeen Munlin](https://appshunter.io/developer/1348165664) | [Bluestone Pond](https://appshunter.io/developer/544105988) |

## What reviewers say

### 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, Vision Pro support

**In-app purchases:** none


### FractalEcho

[App page](https://appshunter.io/ios/app/fractalecho/id6473468070)

Explore the infinite complexity of fractals with stunning visuals and unparalleled depth. This app offers advanced search capabilities, customization options, and educational insights into mathematical concepts. Share your discoveries and learn through an intuitive interface.

**Highlights:** Unrivaled search depth and resolution, Mandelbrot and Julia Set exploration, Animated colors and dynamic palettes, Calculates fractal border length and area, Community gallery and sharing, In-app tutorial

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FractalEcho Pro monthly | $1.99 | per month |
| FractalEcho Pro Yearly | $14.99 | per year |
| FractalEcho Pro | $24.99 | one-time |


## Frequently asked questions

### Is Stars Units Sizes Objects free?

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

### Is FractalEcho free?

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

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

Stars Units Sizes Objects is rated higher. Stars Units Sizes Objects averages 4.3 out of 5 from 6 ratings, while FractalEcho averages 3.9 from 10 ratings.

### Do Stars Units Sizes Objects or FractalEcho have ads?

Stars Units Sizes Objects shows ads; FractalEcho does not.

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

Stars Units Sizes Objects ships an update every 4 months, and FractalEcho fortnightly. Most recently, Stars Units Sizes Objects was updated on November 3, 2026 and FractalEcho on November 5, 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.*