# Back in Time for iPhone vs Universe Size Comparison

The clearest difference is rating: Back in Time for iPhone at 3.8 against Universe Size Comparison's 3.2. Universe Size Comparison's advantage is update cadence (every 3 months vs every 8 months) and price ($1.99 vs $4.99). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Back in Time for iPhone costs $4.99 and Universe Size Comparison $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Back in Time for iPhone holds the better App Store score, 3.8 against 3.2. Both are backed by a comparable volume of ratings — 16 and 30 respectively. Written reviews point the same way: 72% of Back in Time for iPhone's written reviews are positive against 70% of Universe Size Comparison's.

Back in Time for iPhone ships an update every 8 months, Universe Size Comparison every 3 months. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Back in Time for iPhone | Universe Size Comparison |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | **[3.8 (16 ratings)](https://appshunter.io/ios/app/back-in-time-for-iphone/id483148811/reviews)** | [3.2 (30 ratings)](https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews) |
| Number of ratings | 16 | **30** |
| Positive reviews | **71.7% of reviews** | 70.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | Paid | Paid |
| Size | 625 MB | 411 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad, Apple TV** |
| Age rating | 4+ | +4 |
| Developer | [Landka](https://appshunter.io/developer/450345696) | [Daniele Citi](https://appshunter.io/developer/1187632258) |

## What reviewers say

### Back in Time for iPhone

[App page](https://appshunter.io/ios/app/back-in-time-for-iphone/id483148811)

Explore the history of the universe, Earth, life, and civilization through interactive timelines, stunning visuals, and custom animations. This app offers an immersive learning experience with social and historical context for key events.

**Highlights:** Interactive timelines, Over 350 images, 60+ animations and videos, 200+ interesting facts, Offline access, Multilingual support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Universe Size Comparison

[App page](https://appshunter.io/ios/app/universe-size-comparison/id1473946290)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Back in Time for iPhone free?

Back in Time for iPhone costs $4.99, 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, Back in Time for iPhone or Universe Size Comparison?

Back in Time for iPhone is rated higher. Back in Time for iPhone averages 3.8 out of 5 from 16 ratings, while Universe Size Comparison averages 3.2 from 30 ratings.

### Do Back in Time for iPhone or Universe Size Comparison have ads?

Neither Back in Time for iPhone nor Universe Size Comparison shows ads.

### Which is updated more often, Back in Time for iPhone or Universe Size Comparison?

Back in Time for iPhone ships an update every 8 months, and Universe Size Comparison every 3 months. Most recently, Back in Time for iPhone was updated on October 23, 2026 and Universe Size Comparison on October 29, 2026.

---

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