# klang² vs Ray Relay

The clearest difference is iOS requirement: klang² at 15.6 against Ray Relay's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. klang² sells 10 one-off in-app purchases and Ray Relay sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

klang² ships an update every 2 months, Ray Relay every 4 weeks. Both last shipped on September 14, 2026.

## The numbers

| Metric | klang² | Ray Relay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ray-relay/id6769096423/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | — | Free |
| Size | 89 MB | 95 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Oberlin & Rennertz GmbH](https://appshunter.io/developer/1474108830) | [Bogdan Balan](https://appshunter.io/developer/1639802669) |

## What reviewers say

### klang²

[App page](https://appshunter.io/ios/app/klang/id1491987376)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Klang2 Pro Option 0 | Free | one-time |
| Klang2 Pro Option 1 | $0.99 | one-time |
| Bundesländer und Hauptstädte | $0.99 | one-time |
| Klang2 Pro Option 2 | $1.99 | one-time |
| Klang2 Pro Option 3 | $3.99 | one-time |
| Volkslieder Premium | $3.99 | one-time |
| Tierisch Menschlich | $3.99 | one-time |
| Klang2 Pro Option 4 | $7.99 | one-time |
| Klang2 Pro Option 5 | $11.99 | one-time |
| Klang2 Pro Option 6 | $16.99 | one-time |


### Ray Relay

[App page](https://appshunter.io/ios/app/ray-relay/id6769096423)

A premium puzzle game where players route light beams through mirrored grids. Solve logic puzzles by rotating elements to align colorful paths, focusing on reflection and timing-free challenges.

**Highlights:** Light-path puzzles, Mirrored grids, Colorful beam paths, Timing-free logic, Hand-curated levels

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Focal Point Unlock | $1.99 | one-time |
| Double Split Unlock | $1.99 | one-time |
| Black Glass Unlock | $1.99 | one-time |
| Narrow Aperture Unlock | $1.99 | one-time |
| Signal Bloom Unlock | $1.99 | one-time |
| Blue Shift Unlock | $1.99 | one-time |
| Prism Junction Unlock | $1.99 | one-time |
| Silicon Mind Unlock | $1.99 | one-time |
| Event Horizon Unlock | $1.99 | one-time |
| Critical Angle Unlock | $1.99 | one-time |


## Frequently asked questions

### Is klang² free?

klang² is free to download, with in-app purchases available.

### Is Ray Relay free?

Ray Relay is free to download, with in-app purchases available.

### Do klang² or Ray Relay have ads?

Neither klang² nor Ray Relay shows ads.

### Which is updated more often, klang² or Ray Relay?

klang² ships an update every 2 months, and Ray Relay every 4 weeks. Most recently, klang² was updated on September 14, 2026 and Ray Relay on September 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*