# Alien Box vs Stereo Modulator

The clearest difference is review sentiment: Stereo Modulator at 100% against Alien Box's 0%. Stereo Modulator also leads on rating (5.0 vs 1.3) and update cadence (every 3 months vs every 38 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Alien Box costs $2.99 and Stereo Modulator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stereo Modulator holds the better App Store score, 5.0 against 1.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews point the same way: 0% of Alien Box's written reviews are positive against 100% of Stereo Modulator's.

Alien Box ships an update every 38 months, Stereo Modulator every 3 months. The most recent releases landed on August 14, 2026 and August 30, 2026 respectively.

## The numbers

| Metric | Alien Box | Stereo Modulator |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | [1.3 (3 ratings)](https://appshunter.io/ios/app/alien-box/id1235647874/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/stereo-modulator/id1370816026/reviews)** |
| Number of ratings | 3 | 3 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 3 months** |
| Monetization | Paid | Paid |
| Size | 10 MB | 2 MB |
| Requires iOS | 10.0 | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) | [Blue Mangoo Consulting Company Limited](https://appshunter.io/developer/1475107602) |

## What reviewers say

### Alien Box

[App page](https://appshunter.io/ios/app/alien-box/id1235647874)

This audio effect plugin creates a unique sound with increased sustain and gentle, LFO-modulated vibes. It functions as an AUv3 effect for hosts like GarageBand or as a standalone app for real-time audio input processing.

**Highlights:** Unique sound enrichment, LFO modulated vibes, Complex resonator system, AUv3 plugin for hosts, Standalone app mode, Gain, Vibe, Depth, Reverb controls

**Features:** Vision Pro support

**In-app purchases:** none


### Stereo Modulator

[App page](https://appshunter.io/ios/app/stereo-modulator/id1370816026)

This audio effect plugin transforms mono sound into stereo, adding width and depth. It uses micro-delays to create a natural sense of space, with optional LFO modulation for a Leslie speaker-like effect without pitch shifting. Ideal for creating separation in mixes, especially for guitars and vocals.

**Highlights:** Mono to stereo conversion, Adjustable stereo width, Optional LFO modulation, Micro-delay de-correlators, Creates natural spatial depth, No pitch shifting or echo

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Alien Box free?

Alien Box costs $2.99, with no in-app purchases.

### Is Stereo Modulator free?

Stereo Modulator costs $2.99, with no in-app purchases.

### Which has better reviews, Alien Box or Stereo Modulator?

Stereo Modulator is rated higher. Alien Box averages 1.3 out of 5 from 3 ratings, while Stereo Modulator averages 5.0 from 3 ratings.

### Do Alien Box or Stereo Modulator have ads?

Neither Alien Box nor Stereo Modulator shows ads.

### Which is updated more often, Alien Box or Stereo Modulator?

Alien Box ships an update every 38 months, and Stereo Modulator every 3 months. Most recently, Alien Box was updated on August 14, 2026 and Stereo Modulator on August 30, 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.*