Comparison

IMPULSation vs Doubler

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

Head to head
About

IMPULSation

This app is a powerful convolution reverb that lets you load custom impulse responses for endless sound possibilities. Recreate classic amp tones, spaces, and delays with optimized signal processing. It offers a user-friendly interface with essential controls for precise sound shaping.

Highlights
  • Load custom impulse responses (.wav, .aif)
  • AUv3 and AAX plugin support
  • 88 factory presets
  • MIDI Learn and Program Change
  • Pre-Delay, Wet/Dry, Decay controls
  • Stereo Widener
  • iCloud Backup and Sharing
Features
Currently charting
Read full description

IMPULSation is an impulse response/convolution reverb that allows you to load in your own impulses for an an unlimited amount of neverb and amp possibilities. To give you an idea of the power of this app: There are literally hundreds of thousands of impulses freely available online and our app will load them all, given that it’s properly formatted in either .wav or .aif format. Say for example you have an electric piano sound that you want to run through a classic Fender™ AMP. You do a web search for “Fender AMP Impulses” and pick from the thousands of possibilities. You will literally spend hours upon hours freely downloading all of the available spaces, amps, reverbs, and/or delays to use within your favorite AUv3 DAW. The technology of convolving and deconvolving is a method of putting in a signal through an amp, reverb unit, delay unit, or space and with sophisticated mathematical interpolations techniques, you can create a very close replica of the actual source. Our IMPULSation is specifically designed for AMPs, reverbs, delays, and spaces of which our code is optimized to detect which is being used. The detection allows us to optimize the signal for better CPU and for optimal sound. As with all of our other apps, our goal is always simplicity with power. We give you all the important features needed for a great sound, without being too complex. The features are as follows: NEW UPDATED FEATURES: ▪ BlueTooth MiDI Capable ▪ iCloud Backup and Sharing of Presets ▪ Enhanced AUv3 Preset Resizing ▪ Expansion Pack Banners and Branding ▪ Metal support, Faster UI, Faster loading, and major CPU Updates ▪ Two Mode MIDI Program Change General Features: - AUv3 - AAX - 88 Factory Presets - The ability to load in your own impulses using the iOS files app (Works With External Drives via iPadOS) - MIDI Learn parameter **SPECIAL NOTE: Importing works by selecting a folder with .aif or .wav files in it and all of the files will be imported from that folder. App Controls: - Pre-Delay - Wet Controls with Range control for precise scaling - Dry Controls - Decay Controls - Waveform View - Stereo Widener that enhances pre-stereo signals - Master Output Includes Over 200 Impulses from very popular vintage reverb units: - LEX200 - LEX480X - RLND RE201 - RLND DEP3 Echo - EMT 244 - NBA Lush - ASR-10/DP4 - Exotic Places - Special FX ------- ATTENTION iFX Rack Users: 1. The default reverbs are the ones from the FantasyVerb 2. We will be offering a paid IAP option to import impulses. ---------------- Terms and Privacy Notices: • EULA Terms of use - https://gospelmusicians.com/EULA.html • Privacy Policy - https://gospelmusicians.com/privacy-policy.html • Terms and Conditions - https://gospelmusicians.com/terms-conditions.html

About

Doubler

This real-time audio effect plugin creates a natural doubling sound for instruments and vocals. It adds richness and depth, making guitar parts sound massive and enabling flam-like effects on drums. Adjust variation parameters for precise control over the desired doubling effect.

Highlights
  • Real-time stereo doubling
  • Enhances guitar, vocals, and polyphonic instruments
  • Adds richness and depth
  • Creates massive sound for riffs and solos
  • Automatic vocal and instrument doubling
  • Flam-like effects for drums
  • Adjustable variation parameters
Features
Read full description

The Nembrini Audio Doubler tracker turns your guitar performance into a stereo, double-tracked signal in real time, as if two guitarists were playing the same track left and right. Nembrini Audio Doubler is a plug-in designed to enhance your guitar, vocal or polyphonic instrument with a natural doubling effect, adding richness and depth. - Makes your guitar riffs and solos sound massive - Double vocal parts and polyphonic instrument automatically - Add flam-like effects to drums Just put Nembrini Audio real-time Doubler tracking plugin on your track, and adjust the variation parameters controls to create exactly the doubling effect you’re looking for Instant doubling. Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect

Screenshots

IMPULSation4 screens
Doubler1 screens

Verdict

The call

IMPULSation and Doubler both sit at 3.7 stars, but that hides the real split: 50% of IMPULSation's written reviews are positive against 0% of Doubler's. IMPULSation also leads on chart position (#176 vs unranked) and iOS requirement (11.0 vs 15). Doubler's advantage is update cadence (monthly vs every 4 months). On price, rating, ratings volume and ads 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

IMPULSation costs $9.99 and Doubler $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.7 for IMPULSation against 3.8 for Doubler. Both are backed by a comparable volume of ratings — 14 and 6 respectively. Written reviews are what separate them: 50% of IMPULSation's written reviews are positive against 0% of Doubler's.

UpkeepUpdate frequency

IMPULSation ships an update every 4 months, Doubler monthly. The most recent releases landed on September 26, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 7 level
IMPULSation versus Doubler: the parameters behind the verdict, then further details
ParameterIMPULSationDoubler
Price$9.99$9.99
Rating3.7 (14 ratings)3.8 (6 ratings) — better
Positive reviews50.0% of reviews — better0.0% of reviews
Number of ratings14 — better6
Update frequencyEvery 4 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#176 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15
Further details — not scored
Size139 MB22 MB
Age rating4+4+
DeveloperMIDIculous LLCNembrini Audio

Customer experience

IMPULSation

All ratings14 ratings
Positive64.3%
Neutral14.3%
Negative21.4%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Doubler

All ratings6 ratings
Positive50.0%
Neutral33.3%
Negative16.7%
Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

In-app purchases

None

IMPULSation

No in-app purchases

None

Doubler

No in-app purchases

Questions

Is IMPULSation free?
IMPULSation costs $9.99, with no in-app purchases.
Is Doubler free?
Doubler costs $9.99, with no in-app purchases.
Which has better reviews, IMPULSation or Doubler?
Doubler is rated higher. IMPULSation averages 3.7 out of 5 from 14 ratings, while Doubler averages 3.8 from 6 ratings.
Do IMPULSation or Doubler have ads?
Neither IMPULSation nor Doubler shows ads.
Which is updated more often, IMPULSation or Doubler?
IMPULSation ships an update every 4 months, and Doubler monthly. Most recently, IMPULSation was updated on September 26, 2026 and Doubler on October 13, 2026.

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