# Back in Time vs Alien Planets

The clearest difference is update cadence: Back in Time at every 7 months against Alien Planets's every 27 months. Back in Time also leads on price ($7.99 vs $9.99) and iOS requirement (16.0 vs 18.2). On ads, in-app purchases and device support there is nothing between them.

Back in Time costs $7.99 and Alien Planets $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Back in Time ships an update every 7 months, Alien Planets every 27 months. The most recent releases landed on June 9, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Back in Time | Alien Planets |
| --- | --- | --- |
| Price | **$7.99** | $9.99 |
| Rating | **[4.6 (25 ratings)](https://appshunter.io/ios/app/back-in-time/id450345693/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 83.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 27 months |
| Monetization | Paid | — |
| Size | 836 MB | 34 MB |
| Requires iOS | **16.0** | 18.2 |
| Devices | iPad | **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

[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


### 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 free?

Back in Time costs $7.99, with no in-app purchases.

### Is Alien Planets free?

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

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

Neither Back in Time nor Alien Planets shows ads.

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

Back in Time ships an update every 7 months, and Alien Planets every 27 months. Most recently, Back in Time was updated on June 9, 2026 and Alien Planets on September 27, 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.*