Comparison

Alien Box vs Spring Reverb

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

Spring Reverb

This app emulates the sound of vintage spring reverbs found in guitar amplifiers, offering unique sonic possibilities beyond traditional hardware. It allows for detailed manipulation of physical parameters, creating both authentic and experimental reverb effects for various instruments.

Highlights
  • Emulates popular spring reverb sounds
  • Manipulate physical spring parameters
  • Morph between different spring configurations
  • Tempo-synced reverb decay
  • Tube-amp style tremolo (pre/post reverb)
  • Modulation for chorus-like effects
  • Dynamic control with The Ribbon
Read full description

Spring Reverb models the sound and character of popular spring reverbs found in guitar amplifiers, popularized by Surf, Garage and Rockabilly music. Spring takes this a step further by allowing manipulation of physical parameters not normally available in a real spring tank. The results vary from faithful recreations of real springs to distinctive new sounds that push the physical boundaries of reverb. Guitarists love the revered surfer vibe but all creative musicians will find that Spring makes any synthesizer, drum, or vocal stand out in a mix. This vintage reverb sound originally derived from the reflections of sound waves traveling through springs has been given an overhaul for the 21st century and beyond. Eventide Spring contains two different sized ‘spring tanks’ along with the ability to morph between one and three springs. Easily program The Ribbon to seamlessly transition between any two settings in real-time! The added tube-amp-style tremolo can be routed before or after the spring resulting in an unrivaled ability to craft your own unique reverb sound. Alter the intensity by changing the tremolo depth and adjust the tremolo rate in Hz, or note value when tempo-synced to your project. Features: - Artist presets by Matt Lange, Nick Hook, and Nu-Trix. - Tempo Sync reverb decay to your DAW. - Craft original sounds by changing the number of springs and damping frequency. - Alter overall resonance by selecting the size of the spring tank. - Tube-amp-style tremolo that can be routed pre- or post-reverb. - Create chorus-like effects by altering Modulation Level. - The Ribbon controller allows for dynamic modification of several knobs at once to easily morph between settings. - Programmable Hotswitch provides the ability to jump instantly to an alternate sound at the push of a button. - Available as an Audio Units AUv3 plug-in and Standalone App.

Screenshots

Alien Box2 screens
Spring Reverb3 screens

Verdict

The call

The clearest difference is review sentiment: Spring Reverb at 54% against Alien Box's 0%. Spring Reverb also leads on rating (3.9 vs 1.3) and update cadence (every 13 months vs every 38 months). Alien Box's advantage is price ($2.99 vs $14.99). On ads, in-app purchases, monetization model and device support 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 Spring Reverb $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Spring Reverb holds the better App Store score, 3.9 against 1.3. Both are backed by a comparable volume of ratings — 3 and 13 respectively. Written reviews point the same way: 0% of Alien Box's written reviews are positive against 54% of Spring Reverb's.

UpkeepUpdate frequency

Alien Box ships an update every 38 months, Spring Reverb every 13 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Alien Box versus Spring Reverb: the parameters behind the verdict, then further details
ParameterAlien BoxSpring Reverb
Price$2.99 — better$14.99
Rating1.3 (3 ratings)3.9 (13 ratings) — better
Positive reviews0.0% of reviews53.8% of reviews — better
Number of ratings313 — better
Update frequencyEvery 38 monthsEvery 13 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better11.0
Further details — not scored
Size10 MB22 MB
Age rating4+4+
DeveloperAleksandar MlazevEventide

Customer experience

Alien Box

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

Spring Reverb

All ratings13 ratings
Positive69.2%
Neutral0.0%
Negative30.8%
Written reviews13 reviews
Positive53.8%
Neutral0.0%
Negative46.2%

In-app purchases

None

Alien Box

No in-app purchases

None

Spring Reverb

No in-app purchases

Questions

Is Alien Box free?
Alien Box costs $2.99, with no in-app purchases.
Is Spring Reverb free?
Spring Reverb costs $14.99, with no in-app purchases.
Which has better reviews, Alien Box or Spring Reverb?
Spring Reverb is rated higher. Alien Box averages 1.3 out of 5 from 3 ratings, while Spring Reverb averages 3.9 from 13 ratings.
Do Alien Box or Spring Reverb have ads?
Neither Alien Box nor Spring Reverb shows ads.
Which is updated more often, Alien Box or Spring Reverb?
Alien Box ships an update every 38 months, and Spring Reverb every 13 months. Most recently, Alien Box was updated on November 2, 2026 and Spring Reverb on November 3, 2026.

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