# Junk Jack vs Radiation Island

The clearest difference is in-app purchases: Radiation Island at none against Junk Jack's 11. Radiation Island also leads on update cadence (every 3 weeks vs every 3 months). Junk Jack's advantage is iOS requirement (9.0 vs 15). On price, rating, review sentiment and ratings volume there is nothing between them.

Junk Jack costs $4.99 and Radiation Island $4.99 up front. Junk Jack sells 11 one-off in-app purchases. Radiation Island asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.4 for Junk Jack against 4.3 for Radiation Island. Both are backed by a comparable volume of ratings — 471 and 649 respectively. Written reviews are what separate them: 78% of Junk Jack's written reviews are positive against 74% of Radiation Island's.

Junk Jack ships an update every 3 months, Radiation Island every 3 weeks. Both last shipped on September 25, 2026.

## The numbers

| Metric | Junk Jack | Radiation Island |
| --- | --- | --- |
| Price | $4.99 | $4.99 |
| Rating | **[4.4 (471 ratings)](https://appshunter.io/ios/app/junk-jack/id601584735/reviews)** | [4.3 (649 ratings)](https://appshunter.io/ios/app/radiation-island/id923760656/reviews) |
| Number of ratings | 471 | **649** |
| Positive reviews | **78.0% of reviews** | 73.9% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 67 MB | 2.3 GB |
| Requires iOS | **9.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Pixbits SRL](https://appshunter.io/developer/436555493) | [Atypical Games](https://appshunter.io/developer/574375383) |

## What reviewers say

### Junk Jack

[App page](https://appshunter.io/ios/app/junk-jack/id601584735)

Explore, build, and survive in procedurally generated 2D worlds. This sandbox adventure offers creative building, combat, and exploration across multiple planets, with options for both single-player and multiplayer experiences.

**Highlights:** Procedurally generated worlds, Multiplayer support, Creative mode, Extensive equipment system, Adventure mode across multiple planets, Electronics engine for complex creations, Farming system

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Breeding Hat | $0.99 | one-time |
| Extended Day | $0.99 | one-time |
| Complete Craftbook | $0.99 | one-time |
| Dark Ninja | $0.99 | one-time |
| Mining Helmet | $0.99 | one-time |
| Hatcher Hat | $0.99 | one-time |
| Santa Hat | $0.99 | one-time |
| Chemistry Book | $0.99 | one-time |
| Pocket Pug | $0.99 | one-time |
| Legendary Pole | $0.99 | one-time |
| Instant Planets | $1.99 | one-time |

**What reviewers like**

- 🚀 Awesome game
- 🚀 Great sandbox experience
- 🚀 Tons of content
- 🚀 Nostalgic
- 🚀 Addictive gameplay

**What reviewers complain about**

- 🐛 Crashes and glitches
- 🐛 Multiplayer issues
- 🐛 Inventory/crafting bugs
- 🔋 Performance issues on older devices
- 🔒 Lack of cloud/cross-device save support

**Reported bugs**

- Crashes when joining multiplayer
- Inventory items disappearing
- Crafting recipes not working
- Compatibility issues with newer iOS versions
- Multiplayer desync and desyncing

**Requested features**

- Controller support
- More planets/biomes
- NPC/civilization features
- Expanded crafting/progression
- Taming/breeding mechanics


### Radiation Island

[App page](https://appshunter.io/ios/app/radiation-island/id923760656)

Embark on a survival adventure in a vast open world, stranded in an alternate reality. Explore, craft, and fight to uncover secrets and find your way back home. Survive harsh environments, dangerous creatures, and the undead.

**Highlights:** Open-world exploration, Crafting and resource gathering, Combat against wildlife and zombies, Day-night cycle and weather effects, Underwater exploration, Multiplayer arena mode

**Features:** Game Controller support, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 PLEASE KEEP UPDATING
- 👍 Enjoyable for years
- 👍 Immersive environment
- 👍 Tense atmosphere
- 👍 Open world with variety

**What reviewers complain about**

- 🐛 Crashes and resets progress
- 🐛 Glitches with building
- 🐛 Laggy performance in certain areas
- 🔋 Battery draining
- 🐛 Disappearing items and chests

**Reported bugs**

- Crashes causing loss of progress
- Glitches with building and structures
- Disappearing items and chests
- Laggy performance in certain areas
- Compatibility issues with newer iOS versions

**Requested features**

- Creative mode with unlimited resources
- Multiplayer co-op
- More vehicles (cars, boats, etc.)
- Expanded crafting and building options
- More enemy variety and difficulty


## Frequently asked questions

### Is Junk Jack free?

Junk Jack costs $4.99, and also offers in-app purchases.

### Is Radiation Island free?

Radiation Island costs $4.99, with no in-app purchases.

### Which has better reviews, Junk Jack or Radiation Island?

Junk Jack is rated higher. Junk Jack averages 4.4 out of 5 from 471 ratings, while Radiation Island averages 4.3 from 649 ratings.

### Do Junk Jack or Radiation Island have ads?

Neither Junk Jack nor Radiation Island shows ads.

### Which is updated more often, Junk Jack or Radiation Island?

Junk Jack ships an update every 3 months, and Radiation Island every 3 weeks. Most recently, Junk Jack was updated on September 25, 2026 and Radiation Island on September 25, 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.*