# Fly into Space vs Knife Challenge

Fly into Space and Knife Challenge are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fly into Space ships an update every 10 months, Knife Challenge every 8 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Fly into Space | Knife Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fly-into-space/id1503307997/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Every 8 months** |
| Monetization | Ad-supported | — |
| Size | 35 MB | 161 MB |
| Requires iOS | **10.2** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Beijing Guorun Technology Co., Ltd.](https://appshunter.io/developer/1502072156) | [北京快博科斯信息技术有限公司](https://appshunter.io/developer/1530774041) |

## What reviewers say

### Fly into Space

[App page](https://appshunter.io/ios/app/fly-into-space/id1503307997)

Embark on an exciting space flight adventure as a pioneer, overcoming dangers and exploring the unknown. Experience stunning visuals and immersive sound effects as you navigate challenging obstacles and unlock new abilities.

**Highlights:** Pioneer space flight experience, Overcome difficulties and dangers, Stunning visuals and wide field of vision, Immersive sound effects, Unlock new features and abilities, Upgrade skills

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

**In-app purchases:** none


### Knife Challenge

[App page](https://appshunter.io/ios/app/knife-challenge-shooting-game/id6448082794)

**In-app purchases:** none


## Frequently asked questions

### Is Fly into Space free?

Fly into Space is free to download, with no in-app purchases.

### Is Knife Challenge free?

Knife Challenge is free to download, with no in-app purchases.

### Do Fly into Space or Knife Challenge have ads?

Both Fly into Space and Knife Challenge show ads.

### Which is updated more often, Fly into Space or Knife Challenge?

Fly into Space ships an update every 10 months, and Knife Challenge every 8 months. Most recently, Fly into Space was updated on November 3, 2026 and Knife Challenge on November 7, 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.*