Comparison

Universal Zoom vs 国学经典之道德经

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

国学经典之道德经

Read full description

《道德经》被誉为“万经之王”,内容涵盖哲学、伦理学、政治学、军事学等诸多学科,曾被后人尊奉为治国、齐家、修身、为学的宝典。它对我国的哲学、科学、政治、宗教等都产生了深远的影响,体现了古人的一种世界观和人生观。先秦诸子以及国人的文化思想等都或多或少受到《道德经》的影响,而且它的影响是多方面的,包括文化、科学、宗教等各方面。

Screenshots

Universal Zoom4 screens
国学经典之道德经3 screens

Verdict

The call

The clearest difference is price: 国学经典之道德经 at $0.99 against Universal Zoom's $5.99. 国学经典之道德经 also leads on iOS requirement (12.0 vs 15.5). Universal Zoom's advantage is device support. On in-app purchases 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 国学经典之道德经 $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard3 real differences · 7 level
Universal Zoom versus 国学经典之道德经: the parameters behind the verdict, then further details
ParameterUniversal Zoom国学经典之道德经
Price$5.99$0.99 — better
Rating4.8 (366 ratings) — better—
Positive reviews96.7% of reviews—
Number of ratings366 — better—
Update frequencyEvery 4 months—
AdsNo—
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod, Apple TV — better—
Requires iOS15.512.0 — better
Further details — not scored
Size175 MB43 MB
Age rating4+4+
DeveloperGamifyItwenlin Huang

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

国学经典之道德经

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Universal Zoom

No in-app purchases

None

国学经典之道德经

No in-app purchases

Questions

Is Universal Zoom free?
Universal Zoom costs $5.99, with no in-app purchases.
Is 国学经典之道德经 free?
国学经典之道德经 costs $0.99, with no in-app purchases.

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