Comparison

Alien Box vs Heavier Metal

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Alien Box

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
Read full description

Alien Box is a completely new kind of audio effect that you have never heard before. It makes the sound big and slightly increases the sustain while adding gentle vibes to it. The vibes are LFO modulated and the effect is using very complex resonator system inside. It is modulation effect and you can compare it to flanger, phaser or chorus but it is not like any of them… The app is an Audio Unit Effect AUV3 and can be used inside GarageBand or other AU host apps as an effect plug-in. Alien Box can also run as a stand alone app adding effect to the audio input so you can play your guitar, bass or synth directly three the app if you have the connector to do so. Alien Box controls: - Gain - you can use it increase the gain and sustain - Vibe - main tone and background vibes balance - Depth - controls the modulations depth - Reverb - adds reverb to the background vibes

About

Heavier Metal

This music plugin emulates a classic 1990s distortion pedal with advanced digital modeling. It offers full parametric control, capturing the original circuit's behavior for a wide range of guitar tones. Optimized for low CPU usage and low latency, it's compatible with various AUv3 hosts.

Highlights
  • Parametric NAM distortion model
  • Recreates original pedal behavior
  • Mid-forward gain, tight low-end
  • AUv3 plugin for Mac/iOS
  • Native Apple Silicon support
  • Ultra-low CPU, near-zero latency
Features
Read full description

Heavier Metal is a modern distortion plugin based on one of the most aggressive pedals of the 1990s. Built using Artera DSP’s Parametric NAM engine, it delivers not just the sound — but the full behavior of the original circuit. Every knob. Every nuance. Captured with precision. This isn’t a snapshot. Heavier Metal is fully parametric — meaning all front-panel controls respond just like the original analog pedal. From razor-sharp riffs to soaring leads, it gives you the full expressive range of the original hardware, with the flexibility of a native plugin. Key Features – Fully parametric NAM model — not a static capture – Recreates the full tone-shaping behavior of the original HM-style pedal – Mid-forward gain structure with massive sustain and tight low-end – AUv3 plugin for macOS and iOS – Native support for Apple Silicon (M1/M2) – Ultra-low CPU usage and near-zero latency Compatibility Heavier Metal runs in any AUv3-compatible host such as Logic Pro (Mac/iPad), GarageBand (Mac/iOS), AUM, Cubasis, and more. Available exclusively on the App Store.

Screenshots

Alien Box2 screens
Heavier Metal4 screens

Verdict

The call

The clearest difference is review sentiment: Heavier Metal at 100% against Alien Box's 0%. Heavier Metal also leads on rating (5.0 vs 1.3). Alien Box's advantage is price ($2.99 vs $12.99) and iOS requirement (10.0 vs 13.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Alien Box costs $2.99 and Heavier Metal $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Heavier Metal holds the better App Store score, 5.0 against 1.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 0% of Alien Box's written reviews are positive against 100% of Heavier Metal's.

Scorecard4 real differences · 6 level
Alien Box versus Heavier Metal: the parameters behind the verdict, then further details
ParameterAlien BoxHeavier Metal
Price$2.99 — better$12.99
Rating1.3 (3 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings3 — better2
Update frequencyEvery 38 months—
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS10.0 — better13.0
Further details — not scored
Size10 MB80 MB
Age rating4+4+
DeveloperAleksandar MlazevReinarc LLC

Customer experience

Alien Box

All ratings3 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Heavier Metal

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Alien Box

No in-app purchases

None

Heavier Metal

No in-app purchases

Questions

Is Alien Box free?
Alien Box costs $2.99, with no in-app purchases.
Is Heavier Metal free?
Heavier Metal costs $12.99, with no in-app purchases.
Which has better reviews, Alien Box or Heavier Metal?
Heavier Metal is rated higher. Alien Box averages 1.3 out of 5 from 3 ratings, while Heavier Metal averages 5.0 from 2 ratings.
Do Alien Box or Heavier Metal have ads?
Neither Alien Box nor Heavier Metal shows ads.

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