Comparison

Stars Units Sizes Objects vs FractalEcho

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Stars Units Sizes Objects

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
Read full description

Size of the smallest to largest objects and stars. Compare the size of objects in the universe. Object images. Pinch/Zoom image. Pan/Move image. Rotate image. Double tap to reset an image. From the smallest to the largest one. From planck length to observable universe. From Yoctometre, Zeptometre, Attometre, Femtometre, Picometre, Nanometre, Micro, Millimetre, Centimetre, Metre, KiloMetre, Lightyear, Parsecs, Billion Lightyears to 93 Billion Lightyears. Size of objects, particles, atoms, cells, stars and galaxies. Get to know the stars. Get to know the spaces. get to know the universe. How small is this world. How big is the universe. And How great is the creator. How far is the star distance from earth. Two way 18 distance unit conversion. planck length, yoctometer, zeptometer, attometer, femtometer, picometre, nanometre, micrometre, Millimeter, Centimeter, Meter, Kilometer, Inch, Foot, Mile, Astronomical, Lightyear, Parsecs. Perform auto conversion when picker is changed. Share conversion result. Reset unit convertor.

About

FractalEcho

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
Read full description

Discover the mesmerizing world of fractals with FractalEcho, a powerful app that brings stunning visuals through virtually unlimited search capabilities to your fingertips. Explore intricate patterns that were once limited to supercomputers now accessible on your device. Unrivaled Search Depth and Resolution: FractalEcho enables you to explore fractals at up to 1,000,000,000 iterations and resolutions of up to 1e-1100. Imagine one billion iteration searches at resolutions of over one thousand digits of accuracy! This level of detail enables you to uncover previously hidden depths and push beyond the boundaries previously thought possible. FractalEcho: Where Mathematical Precision Meets Artistic Wonder Unlock the captivating world of fractals with FractalEcho – a powerful and intuitive app that brings the beauty of infinite complexity to your fingertips. Explore intricate patterns, hidden depths, and breathtaking visuals previously confined to high-end computing, now accessible on your device. Unrivaled Depth & Resolution: Experience virtually unlimited fractal generation like never before! FractalEcho enables fractal exploration at up to 1,000,000,000 iterations with a stunning 1e-1100 resolution – far exceeding the capabilities of other apps. Discover fractals never before seen to push beyond the boundaries of visual exploration. Utilizing advanced real-time algorithms, FractalEcho delivers unparalleled resolutions. Explore & Customize: Delve into Mandelbrot and Julia Sets, bringing them to life with animated colors, dynamic color palettes, and precise control over search depth, zoom levels, and color rates of change. Experiment endlessly to discover stunning new forms. A Unique Educational Tool: FractalEcho uniquely calculates both the border length and area of the fractal at any given iteration level, visually demonstrating the fascinating concept of an infinite boundary contained within a finite space – a core principle of fractals. Community & Sharing: Discover a vibrant gallery showcasing stunning fractals uncovered by other users. Save your favorite discoveries with bookmarks and personal notes. Share your own artistic discoveries with the world – export high-resolution graphics and fractal data for others to enjoy. Easy to Use: An in-app tutorial guides you through FractalEcho’s powerful features, making fractal exploration accessible to everyone. Whether you're a math enthusiast, an artist, or simply curious about the fractal universe, FractalEcho offers something for you. To illustrate the extreme resolution FractalEcho achieves, consider a comparison between two extremes: the most distant known galaxy (JADES-GS-z14-0) estimated to be 33.6 billion (33.6e+9) light years away, and an electron within an atom having an estimated diameter of about 5.636e-15 meters. The electron diameter is about 1.78e-41 times the distance to the farthest known galaxy. This is a number with 41 digits after the decimal point. FractalEcho’s resolution of 1e-1100 is over 1e1050 times more accurate than this comparison. To put it another way, if we measured the distance to the farthest known galaxy in units of electron diameters, FractalEcho's calculations would still be 1e1050 times more accurate. To represent FractalEcho’s accuracy in writing would require a decimal place followed by 1,100 zeros before the first non zero digit ie: 0.00000000…..1. Perfect for math enthusiasts and artists! Download FractalEcho and begin your journey into the infinite beauty of fractals! Visit https://FractalEcho.com to learn more. Some features require in-app purchases that can be shared across all your Macs, iPhones, and iPads. View our on-line gallery at: https://data.bluestonepond.com/FrE/FrE_Action/FrE_Gallery.php View our privacy policy at: https://fractalecho.com/FractalEchoPP/FrE_PrivacyPolicy.html View our terms of service policy at: https://fractalecho.com/FractalEchoPP/FrE_TermsOfUse.html

Screenshots

Stars Units Sizes Objects4 screens
FractalEcho4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Stars Units Sizes Objects versus FractalEcho: the parameters behind the verdict, then further details
ParameterStars Units Sizes ObjectsFractalEcho
PriceFreeFree
Rating4.3 (6 ratings) — better3.9 (10 ratings)
Positive reviews80.0% of reviews80.0% of reviews
Number of ratings610 — better
Update frequencyEvery 4 monthsFortnightly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS11.0 — better17.6
Further details — not scored
Size124 MB138 MB
Age rating4+4+
DeveloperMudarmeen MunlinBluestone Pond

Customer experience

Stars Units Sizes Objects

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

FractalEcho

All ratings10 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

None

Stars Units Sizes Objects

No in-app purchases

3 purchases

FractalEcho

Subscriptions2
  • FractalEcho Pro monthly$1.991 Month
  • FractalEcho Pro Yearly3 Days trial$14.991 Year
One-time1
  • FractalEcho Pro$24.99

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.

Other comparisons