Comparison

Stars Units Sizes Objects vs Univerzoom 2D Size Comparison

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

Univerzoom 2D Size Comparison

Explore the relative sizes of everyday objects with minimalist visual comparisons. Create and share custom comparisons of vehicles, animals, landmarks, and more to understand their true dimensions. Perfect for students, educators, and anyone curious about scale.

Highlights
  • Create custom size comparisons
  • Explore terrestrial object categories
  • Visualize dimensions in orthogonal perspective
  • Customize comparisons with an easy interface
  • Save and share visual references
Features
Read full description

Discover the power of visual scale with Univerzoom 2D, the perfect companion to our cosmic Univerzoom 3D app. While Univerzoom 3D explores the vast reaches of the universe, Univerzoom 2D brings scale comparison down to Earth — focusing on the fascinating dimensions of objects from our everyday world. Create clear and intuitive size comparisons using minimalist black silhouettes in a clean, orthogonal perspective. Compare vehicles, animals, dinosaurs, landmarks, and many other earthly objects to better understand their true relative sizes. Key Features • Create custom size comparisons with sleek, minimalist shapes • Explore multiple terrestrial categories, including vehicles, animals, and prehistoric life • Visualize dimensions in a clean, orthogonal perspective • Customize comparisons with an easy-to-use interface • Save and share visual references with others Perfect for students, educators, designers, and curious minds, Univerzoom 2D transforms abstract measurements into meaningful visual understanding. Did you know a Tyrannosaurus rex was roughly the size of a school bus? Or how different vehicles compare across regions? Discover fascinating size relationships and build your own comparisons. Inspired by popular scale comparison videos from YouTube creator morn1415, this app puts the power of perspective in your hands — complementing the cosmic scale of Univerzoom 3D with a focus on our world. Download Univerzoom 2D for free and start exploring scale comparisons. Additional content and features are available via optional in-app purchase.

Screenshots

Stars Units Sizes Objects4 screens
Univerzoom 2D Size Comparison4 screens

Verdict

The call

The clearest difference is in-app purchases: Stars Units Sizes Objects at none against Univerzoom 2D Size Comparison's 3. Stars Units Sizes Objects also leads on iOS requirement (11.0 vs 13.0). Univerzoom 2D Size Comparison's advantage is ads (none vs shown) and update cadence (weekly vs every 4 months). On price 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. Univerzoom 2D Size Comparison sells 3 one-off in-app purchases. Stars Units Sizes Objects asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Univerzoom 2D Size Comparison holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Univerzoom 2D Size Comparison has 77 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 80% of Stars Units Sizes Objects's written reviews are positive against 100% of Univerzoom 2D Size Comparison's.

UpkeepUpdate frequency

Stars Units Sizes Objects ships an update every 4 months, Univerzoom 2D Size Comparison weekly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

Scorecard8 real differences · 2 level
Stars Units Sizes Objects versus Univerzoom 2D Size Comparison: the parameters behind the verdict, then further details
ParameterStars Units Sizes ObjectsUniverzoom 2D Size Comparison
PriceFreeFree
Rating4.3 (6 ratings)4.6 (77 ratings) — better
Positive reviews80.0% of reviews100.0% of reviews — better
Number of ratings677 — better
Update frequencyEvery 4 monthsWeekly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size124 MB254 MB
Age rating4+4+
DeveloperMudarmeen MunlinLinda Schnetzinger

Customer experience

Stars Units Sizes Objects

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

Univerzoom 2D Size Comparison

All ratings67 ratings
Positive89.6%
Neutral4.5%
Negative6.0%
Written reviews21 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stars Units Sizes Objects

No in-app purchases

3 purchases

Univerzoom 2D Size Comparison

One-time3
  • Upgrade to Complete Collection$1.99
  • Premium Unlock$1.99
  • Complete Collection$3.99

Questions

Is Stars Units Sizes Objects free?
Stars Units Sizes Objects is free to download, with no in-app purchases.
Is Univerzoom 2D Size Comparison free?
Univerzoom 2D Size Comparison is free to download, with in-app purchases available.
Which has better reviews, Stars Units Sizes Objects or Univerzoom 2D Size Comparison?
Univerzoom 2D Size Comparison is rated higher. Stars Units Sizes Objects averages 4.3 out of 5 from 6 ratings, while Univerzoom 2D Size Comparison averages 4.6 from 77 ratings.
Do Stars Units Sizes Objects or Univerzoom 2D Size Comparison have ads?
Stars Units Sizes Objects shows ads; Univerzoom 2D Size Comparison does not.
Which is updated more often, Stars Units Sizes Objects or Univerzoom 2D Size Comparison?
Stars Units Sizes Objects ships an update every 4 months, and Univerzoom 2D Size Comparison weekly. Most recently, Stars Units Sizes Objects was updated on November 3, 2026 and Univerzoom 2D Size Comparison on November 7, 2026.

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