# THE SPECTRUM vs DuelAF

The clearest difference is iOS requirement: THE SPECTRUM at 8.0 against DuelAF's 16. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | THE SPECTRUM | DuelAF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/the-spectrum/id1461654114/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free | — |
| Size | 40 MB | 17 MB |
| Requires iOS | **8.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [KEITA YASUI](https://appshunter.io/developer/767721147) | [Adrian Gonzalez](https://appshunter.io/developer/1793411654) |

## What reviewers say

### THE SPECTRUM

[App page](https://appshunter.io/ios/app/the-spectrum/id1461654114)

Guide falling photons to collect hues evenly and create a unique spectrum. This immersive experience is best enjoyed in a dark room, allowing the ever-changing motion of lights to spark your imagination.

**Highlights:** Collect falling photons, Create a color spectrum, Evenly collect hues, Immersive light motion, Spark imagination

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

**In-app purchases:** none


### DuelAF

[App page](https://appshunter.io/ios/app/duelaf/id6782652571)

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

**In-app purchases:** none


## Frequently asked questions

### Is THE SPECTRUM free?

THE SPECTRUM is free to download, with no in-app purchases.

### Is DuelAF free?

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

### Do THE SPECTRUM or DuelAF have ads?

Neither THE SPECTRUM nor DuelAF shows ads.

### Which is updated more often, THE SPECTRUM or DuelAF?

THE SPECTRUM ships an update fortnightly, and DuelAF fortnightly. Most recently, THE SPECTRUM was updated on October 19, 2026 and DuelAF on October 14, 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.*