# Collatz Hailstone Link vs Prism Expanse

The clearest difference is in-app purchases: Collatz Hailstone Link at none against Prism Expanse's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Prism Expanse sells 4 one-off in-app purchases. Collatz Hailstone Link asks for nothing beyond the download.

Collatz Hailstone Link ships an update weekly, Prism Expanse every 10 days. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Collatz Hailstone Link | Prism Expanse |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 10 days |
| Size | 118 MB | 157 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KwangHo Yun](https://appshunter.io/developer/1669492345) | [John Kusion](https://appshunter.io/developer/6802479963) |

## What reviewers say

### Collatz Hailstone Link

[App page](https://appshunter.io/ios/app/collatz-hailstone-link/id6780455667)

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

**In-app purchases:** none


### Prism Expanse

[App page](https://appshunter.io/ios/app/prism-expanse/id6811199683)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1,000 Prism Shards | $0.99 | one-time |
| 5,500 Prism Shards | $4.99 | one-time |
| 12,000 Prism Shards | $9.99 | one-time |
| 25,000 Prism Shards | $19.99 | one-time |


## Frequently asked questions

### Is Collatz Hailstone Link free?

Collatz Hailstone Link is free to download, with no in-app purchases.

### Is Prism Expanse free?

Prism Expanse is free to download, with in-app purchases available.

### Do Collatz Hailstone Link or Prism Expanse have ads?

Both Collatz Hailstone Link and Prism Expanse show ads.

### Which is updated more often, Collatz Hailstone Link or Prism Expanse?

Collatz Hailstone Link ships an update weekly, and Prism Expanse every 10 days. Most recently, Collatz Hailstone Link was updated on October 31, 2026 and Prism Expanse on October 24, 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.*