Comparison

Universal Zoom vs Universe Size Comparison

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

Head to head
About

Universal Zoom

Explore the universe's vastness and intricacy through interactive visual comparisons. Seamlessly zoom from subatomic particles to the observable universe, gaining intuition about scale and size with stunning imagery and clear explanations.

Highlights
  • Seamless zooming across scales
  • Visual comparisons of objects
  • Jargon-free scientific explanations
  • Audio narration
  • Over 270 objects presented to scale
  • Multi-language support
Features
Read full description

The universe is endlessly vast. A single atom is impossibly small. And somewhere between those two extremes lies everything that has ever existed. We believe that feeling — the electric, spine-tingling sense of scale — belongs to everyone. Not just scientists. Not just students. Everyone. That's why we built Universal Zoom. WHAT YOU CAN DO • Zoom seamlessly from the Planck length to the edge of the observable universe — about 300 objects presented to perfect scale. • Compare any two objects side by side: how many Earths fit inside Jupiter? How does a virus measure up against a skyscraper? Instant, visual, intuitive. (No other scale app lets you do this.) • Go deeper with audio narration and short, accessible explanations — the facts that matter, in plain language. WHAT YOU'LL EXPLORE • Elementary particles — quarks, leptons, and bosons. Atomic nuclei, atoms, and DNA. Living cells. Animals and landmarks. Planets, stars, and galaxies. A deep dive into physics, biology, and astronomy — with short, plain-language articles that make even particle physics easy to grasp — in 40 languages, with metric, imperial, or powers-of-ten units. • Real high-resolution photos and electron microscope images, where possible. Original artwork for things that can't be photographed — like elementary particles and DNA structures. • No ads. No in-app purchases. Pure discovery. BUILT WITH YOU We're a team of two (Andrey and Oksana) from Canada who have poured a decade into this app because we genuinely love science. Most objects come from community suggestions — carefully fact-checked and updated with every new discovery. Over 200 more are already in the queue. FOR EDUCATORS Used by teachers worldwide to visualize scale, build measurement intuition, and turn abstract numbers into "aha" moments. Available at 50% off for schools via Apple School Manager (20+ copies). FOLLOW THE JOURNEY Sneak peeks and upcoming additions: @gamifyitapps on X, YouTube, and TikTok. Feedback and ideas: gamifyitapps.com/contact

About

Universe Size Comparison

Explore the vastness of space and understand celestial body dimensions through interactive 3D comparisons. Discover the scale of planets and stars, from our Sun to hypergiant stars, with guided tours and free comparison modes.

Highlights
  • 3D astronomical comparisons
  • Tour Mode with guided explanations
  • Free Mode for custom comparisons
  • Scale comparisons of planets and stars
  • Detailed celestial body information
  • Elegant user interface
Features
Read full description

Universe Size Comparison is a unique 3D astronomical app that will make you understand the real dimensions of the universe and how small we are. Have you ever wondered how big the Sun is compared to Earth? Or what is the largest planet between Mars and Earth? Do you want to find out the dimensions of some of the most famous stars in the sky like Rigel and Betelgeuse in comparison to our Sun? Do you want to compare everything with the hypergiant star VY Canis Majoris? Universe Size Comparison is the right app for you. The app offers two modes: Tour Mode and Free Mode. Tour mode will guide you on a spectacular journey where you will see planets and stars compared in full scale. All accompanied by simple and clear explanations regardless of the level of knowledge of the subject. The Free mode will allow you to compare two celestial bodies of your choice in scale. You will also find out more information on the bodies you are comparing thanks to an elegant user interface designed to offer the maximum user experience.

Screenshots

Universal Zoom4 screens
Universe Size Comparison4 screens

Verdict

The call

The clearest difference is rating: Universal Zoom at 4.8 against Universe Size Comparison's 3.2. Universal Zoom also leads on review sentiment (97% vs 70%) and ratings volume (366 vs 30). Universe Size Comparison's advantage is price ($1.99 vs $5.99). On update cadence, ads, in-app purchases and monetization model 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

Universal Zoom costs $5.99 and Universe Size Comparison $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Universal Zoom holds the better App Store score, 4.8 against 3.2. That said, the two scores are not equally well evidenced: Universal Zoom has 366 ratings behind it against 30, so its average is the more settled of the two. Written reviews point the same way: 97% of Universal Zoom's written reviews are positive against 70% of Universe Size Comparison's.

UpkeepUpdate frequency

Universal Zoom ships an update every 4 months, Universe Size Comparison every 3 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Universal Zoom versus Universe Size Comparison: the parameters behind the verdict, then further details
ParameterUniversal ZoomUniverse Size Comparison
Price$5.99$1.99 — better
Rating4.8 (366 ratings) — better3.2 (30 ratings)
Positive reviews96.7% of reviews — better70.0% of reviews
Number of ratings366 — better30
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod, Apple TV — betteriPhone, iPad, Apple TV
Requires iOS15.5 — better17.0
Further details — not scored
Size175 MB411 MB
Age rating4++4
DeveloperGamifyItDaniele Citi

Customer experience

Universal Zoom

All ratings356 ratings
Positive95.5%
Neutral2.0%
Negative2.5%
Written reviews389 reviews
Positive96.7%
Neutral1.5%
Negative1.8%

Universe Size Comparison

All ratings30 ratings
Positive46.7%
Neutral20.0%
Negative33.3%
Written reviews10 reviews
Positive70.0%
Neutral30.0%
Negative0.0%

Bugs and requests

Universal Zoom

Reported bugs

3 issues
  • Incorrect information for some objects
  • Compatibility issues on older devices
  • Typos and minor errors in text

Requested features

5 requests
  • Add more objects and comparisons
  • Customizable object feature
  • Support for more languages
  • Ability to toggle between metric and imperial units
  • Search and filtering options

Universe Size Comparison

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Universal Zoom

No in-app purchases

None

Universe Size Comparison

No in-app purchases

Questions

Is Universal Zoom free?
Universal Zoom costs $5.99, with no in-app purchases.
Is Universe Size Comparison free?
Universe Size Comparison costs $1.99, with no in-app purchases.
Which has better reviews, Universal Zoom or Universe Size Comparison?
Universal Zoom is rated higher. Universal Zoom averages 4.8 out of 5 from 366 ratings, while Universe Size Comparison averages 3.2 from 30 ratings.
Do Universal Zoom or Universe Size Comparison have ads?
Neither Universal Zoom nor Universe Size Comparison shows ads.
Which is updated more often, Universal Zoom or Universe Size Comparison?
Universal Zoom ships an update every 4 months, and Universe Size Comparison every 3 months. Most recently, Universal Zoom was updated on November 6, 2026 and Universe Size Comparison on November 3, 2026.

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