# Back in Time vs Univerzoom 2D Size Comparison

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.

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.

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.

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.

## The numbers

| Metric | Back in Time | Univerzoom 2D Size Comparison |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.7 (27 ratings)](https://appshunter.io/ios/app/back-in-time/id450345693/reviews)** | [4.6 (77 ratings)](https://appshunter.io/ios/app/univerzoom-2d-size-comparison/id1598332779/reviews) |
| Number of ratings | 27 | **77** |
| Positive reviews | 75.9% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 836 MB | 254 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Landka](https://appshunter.io/developer/450345696) | [Linda Schnetzinger](https://appshunter.io/developer/1479825448) |

## What reviewers say

### Back in Time

[App page](https://appshunter.io/ios/app/back-in-time/id450345693)

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:** macOS Compatibility

**In-app purchases:** none


### Univerzoom 2D Size Comparison

[App page](https://appshunter.io/ios/app/univerzoom-2d-size-comparison/id1598332779)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Complete Collection | $1.99 | one-time |
| Premium Unlock | $1.99 | one-time |
| Complete Collection | $3.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*