IMPULSation vs ChordGen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
ChordGen
Generate chords for any stringed instrument with custom tunings. This universal chord dictionary is ideal for beginners, songwriters, and musicians seeking new sounds. Easily search for specific chords and explore variations.
- Generate any chord
- Select any instrument
- Choose any tuning
- Generate chords with bass notes
- Text search system
- Universal chord dictionary
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Chords for any instrument, in any tuning. ChordGen is a chord generator and dictionary for fretted string instruments. Explore chords, try different tunings, and discover new ways to play, practice, and compose. Choose an instrument and tuning to see chord voicings directly on the fretboard. You can also create custom instruments and tunings to go beyond traditional setups. Explore chords Generate chords and see exactly how to play them. Quickly search for the chord you need and browse different voicings, including slash chords such as C/B. Instruments and tunings Use a range of fretted string instruments, change their tunings, or build your own configurations. Experiment with new combinations and discover different sounds. Create and organize chord sheets Create your own chord sheets or start from a chord-sheet link on the web. Add and organize chords, keep your songs together, and check each voicing while you play or work on a composition. Choose the voicing you want for any chord, or let ChordGen find suitable positions for the remaining chords based on the selected instrument and tuning. Whether you are learning an instrument, exploring an alternate tuning, studying harmony, playing your songs, or composing, ChordGen gives you a simple and flexible way to work with chords.
Screenshots
Verdict
The clearest difference is price: ChordGen at Free against IMPULSation's $9.99. ChordGen also leads on rating (5.0 vs 3.7). IMPULSation's advantage is update cadence (every 4 months vs every 12 months) and ratings volume (14 vs 1). On ads, in-app purchases 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
ChordGen is free to download; IMPULSation costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ChordGen holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: IMPULSation has 14 ratings behind it against 1, so its average is the more settled of the two.
IMPULSation ships an update every 4 months, ChordGen every 12 months. The most recent releases landed on September 26, 2026 and October 6, 2026 respectively.
| Parameter | IMPULSation | ChordGen |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 3.7 (14 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 14 — better | 1 |
| Update frequency | Every 4 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #176 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 139 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | MIDIculous LLC | Gustavo Sore |
Customer experience
IMPULSation
ChordGen
In-app purchases
IMPULSation
No in-app purchases
ChordGen
No in-app purchases









