Comparison

Back in Time 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

Back in Time

Explore the history of the Universe, Earth, Life, and Civilization through an immersive, interactive journey. This app uses custom animations, timelines, and interesting facts to bring historical events to life. It's designed to help users understand the connections between events and see the bigger picture.

Highlights
  • Interactive timeline of events
  • Custom animations and videos
  • Over 350 remarkable images
  • Little-known interesting facts
  • Offline access
  • Multilingual support
Features
Read full description

• "The coolest history textbook you’ll find on the iPad" - The New York Times • Winner of the WSA Mobile Award • Top1 iPad Book in US, UK, FR, ES, China… and 34 more Countries • Featured by The New York Times (Top10 iPad Apps of the year) • Featured by the American Photo Magazine (Top 10 Photo eBooks of the year) For iPhone/iPod touch download - Back in Time for iPhone Back in Time will take you on a stunning exploration of the history of our Universe, Earth, Life and Civilization. A journey through time where each event is documented with social and historical context, several images, an illustrative timeline and little-known interesting facts. Custom made animations bring those events to life, creating an interesting, immersive learning experience. An imaginary clock will guide you through this quest, proposing a simple analogy: the entire Universe started 24 hours ago. The Big Bang, the source of time and space, is the first event in our journey – the clock reads 0:00 hours. Today, 13.7 billion years later, the clock reads midnight. In between is a sequence of key events that has brought us to where we are today. Explore them, place them in perspective, see how they relate and understand the connections. We invite you to take a step back and see the whole picture. :::: REVIEWS :::: “...a beautifully executed lesson on the history of the universe and the evolution of life on earth. Great for high school students or parents who’d like to tutor younger children and enjoy a first-rate experience of their own...” - Bob Tedeschi, The New York Times “The iPad could use more apps like this one.” - The Daily “...the best iPad apps are those that combine coffee table-styled books with the fluid nature of the iPad’s interface. Back in Time is just that, it’s the story of the entire history of our universe made interactive on the iPad.” - Casey Chan, Gizmodo (App of the Day) “Back in Time is utterly gorgeous in its presentation. (...) The app is so easy to navigate that it is a delight to explore. Landka could scarcely have done a better job in putting everything together.” - Gwen Phua, Appmodo :::: FEATURES :::: Designed for iPad; 47 chapters; Over 350 remarkable images; 60+ amazing animations and videos; 40+ illustrated timelines; More than 200 little-known interesting facts; Music by the composer Rodrigo Leão; Developed in 7 different languages (English, Spanish, German, French, Portuguese, Japanese and Chinese); No internet connection required.

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

Univerzoom 2D Size Comparison4 screens

Verdict

The call

The clearest difference is price: Univerzoom 2D Size Comparison at Free against Back in Time's $7.99. Univerzoom 2D Size Comparison also leads on update cadence (weekly vs every 7 months) and review sentiment (100% vs 76%). Back in Time's advantage is in-app purchases (none vs 3). On rating, ratings volume and ads 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

Univerzoom 2D Size Comparison is free to download; Back in Time costs $7.99 up front. Univerzoom 2D Size Comparison sells 3 one-off in-app purchases. Back in Time asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Back in Time against 4.6 for Univerzoom 2D Size Comparison. Both are backed by a comparable volume of ratings — 27 and 77 respectively. Written reviews are what separate them: 76% of Back in Time's written reviews are positive against 100% of Univerzoom 2D Size Comparison's.

UpkeepUpdate frequency

Back in Time ships an update every 7 months, Univerzoom 2D Size Comparison weekly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard7 real differences · 3 level
Back in Time versus Univerzoom 2D Size Comparison: the parameters behind the verdict, then further details
ParameterBack in TimeUniverzoom 2D Size Comparison
Price$7.99Free — better
Rating4.7 (27 ratings) — better4.6 (77 ratings)
Positive reviews75.9% of reviews100.0% of reviews — better
Number of ratings2777 — better
Update frequencyEvery 7 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size836 MB254 MB
Age rating4+4+
DeveloperLandkaLinda Schnetzinger

Customer experience

Back in Time

All ratings25 ratings
Positive92.0%
Neutral4.0%
Negative4.0%
Written reviews108 reviews
Positive75.9%
Neutral12.0%
Negative12.0%

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

Back in Time

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 Back in Time free?
Back in Time costs $7.99, 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, Back in Time or Univerzoom 2D Size Comparison?
Back in Time is rated higher. Back in Time averages 4.7 out of 5 from 27 ratings, while Univerzoom 2D Size Comparison averages 4.6 from 77 ratings.
Do Back in Time or Univerzoom 2D Size Comparison have ads?
Neither Back in Time nor Univerzoom 2D Size Comparison shows ads.
Which is updated more often, Back in Time or Univerzoom 2D Size Comparison?
Back in Time ships an update every 7 months, and Univerzoom 2D Size Comparison weekly. Most recently, Back in Time was updated on November 1, 2026 and Univerzoom 2D Size Comparison on November 3, 2026.

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