# Back in Time for iPhone vs Alien Planets

The clearest difference is price: Back in Time for iPhone at $4.99 against Alien Planets's $9.99. Back in Time for iPhone also leads on update cadence (every 8 months vs every 27 months) and iOS requirement (16.0 vs 18.2). On ads, in-app purchases and device support there is nothing between them.

Back in Time for iPhone costs $4.99 and Alien Planets $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Back in Time for iPhone ships an update every 8 months, Alien Planets every 27 months. The most recent releases landed on September 19, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Back in Time for iPhone | Alien Planets |
| --- | --- | --- |
| Price | **$4.99** | $9.99 |
| Rating | **[3.8 (15 ratings)](https://appshunter.io/ios/app/back-in-time-for-iphone/id483148811/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 71.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 27 months |
| Monetization | Paid | — |
| Size | 625 MB | 34 MB |
| Requires iOS | **16.0** | 18.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Landka](https://appshunter.io/developer/450345696) | [Jose Leal](https://appshunter.io/developer/1441468562) |

## 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


### Alien Planets

[App page](https://appshunter.io/ios/app/alien-planets/id1478121868)

**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 Alien Planets free?

Alien Planets costs $9.99, with no in-app purchases.

### Do Back in Time for iPhone or Alien Planets have ads?

Neither Back in Time for iPhone nor Alien Planets shows ads.

### Which is updated more often, Back in Time for iPhone or Alien Planets?

Back in Time for iPhone ships an update every 8 months, and Alien Planets every 27 months. Most recently, Back in Time for iPhone was updated on September 19, 2026 and Alien Planets on September 9, 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.*