# Radiation Island vs Grimvalor

The clearest difference is rating: Grimvalor at 4.9 against Radiation Island's 4.3. Grimvalor also leads on review sentiment (91% vs 74%) and ratings volume (9.8K vs 650). Radiation Island's advantage is update cadence (every 3 weeks vs every 2 months) and price ($4.99 vs $5.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

Radiation Island costs $4.99 and Grimvalor $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Grimvalor holds the better App Store score, 4.9 against 4.3. That said, the two scores are not equally well evidenced: Grimvalor has 9.8K ratings behind it against 650, so its average is the more settled of the two. Written reviews point the same way: 74% of Radiation Island's written reviews are positive against 91% of Grimvalor's.

Radiation Island ships an update every 3 weeks, Grimvalor every 2 months. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Radiation Island | Grimvalor |
| --- | --- | --- |
| Price | **$4.99** | $5.99 |
| Rating | [4.3 (650 ratings)](https://appshunter.io/ios/app/radiation-island/id923760656/reviews) | **[4.9 (9.8K ratings)](https://appshunter.io/ios/app/grimvalor/id1369179088/reviews)** |
| Number of ratings | 650 | **9.8K** |
| Positive reviews | 73.9% of reviews | **90.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Paid | Paid |
| Best chart rank | — | **#134** |
| Size | 2.3 GB | 739 MB |
| Requires iOS | 15 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Atypical Games](https://appshunter.io/developer/574375383) | [Direlight](https://appshunter.io/developer/857649562) |

## What reviewers say

### 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


### Grimvalor

[App page](https://appshunter.io/ios/app/grimvalor/id1369179088)

**Currently charting:** #134 Top Paid · Action, #135 Top Paid · Adventure (US App Store)

Embark on a dark fantasy adventure as a lone warrior battling through a corrupted realm. Master skill-based combat, explore atmospheric landscapes, and face epic boss fights in this challenging hack and slash platformer. Restore the kingdom and uncover the fate of its lost king.

**Highlights:** Skill-based combat, Exploration of dark fantasy world, Epic boss fights, Stunning 3D visuals, Customizable touch controls, MFi controller support, Offline play

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Smooth gameplay
- 👍 Excellent controls
- 🎨 Beautiful graphics
- 🎶 Great soundtrack
- 💰 Worth the price

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🕹️ Challenging difficulty spikes
- 🕹️ Frustrating jumping puzzles
- 🕹️ Dodge mechanic issues
- 🔍 Lack of character customization

**Reported bugs**

- Dodge not registering properly
- Crashes in New Game Plus
- Companion AI issues
- Graphical glitches on older devices

**Requested features**

- More levels and content
- Ability to replay bosses
- Enemy scaling for higher difficulties
- Expanded weapon and trinket selection
- New game plus improvements


## Frequently asked questions

### Is Radiation Island free?

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

### Is Grimvalor free?

Grimvalor costs $5.99, with no in-app purchases.

### Which has better reviews, Radiation Island or Grimvalor?

Grimvalor is rated higher. Radiation Island averages 4.3 out of 5 from 650 ratings, while Grimvalor averages 4.9 from 9.8K ratings.

### Do Radiation Island or Grimvalor have ads?

Neither Radiation Island nor Grimvalor shows ads.

### Which is updated more often, Radiation Island or Grimvalor?

Radiation Island ships an update every 3 weeks, and Grimvalor every 2 months. Most recently, Radiation Island was updated on October 29, 2026 and Grimvalor on October 31, 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.*