# Room Impulse Response vs ChordUp

The clearest difference is review sentiment: ChordUp at 94% against Room Impulse Response's 0%. ChordUp also leads on price ($5.99 vs $49.99) and in-app purchases (none vs 1). On ads, monetization model, device support and iOS requirement there is nothing between them.

Room Impulse Response costs $49.99 and ChordUp $5.99 up front. Room Impulse Response sells 1 one-off in-app purchase. ChordUp asks for nothing beyond the download.

Room Impulse Response ships an update every 5 months, ChordUp every 3 weeks. The most recent releases landed on September 16, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Room Impulse Response | ChordUp |
| --- | --- | --- |
| Price | $49.99 | **$5.99** |
| Rating | — | **[4.4 (41 ratings)](https://appshunter.io/ios/app/chordup/id1058553903/reviews)** |
| Number of ratings | — | **41** |
| Positive reviews | 0.0% of reviews | **94.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 55 MB | 30 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Smith](https://appshunter.io/developer/291822462) | [Dmitrii Klochkov](https://appshunter.io/developer/1058553902) |

## What reviewers say

### Room Impulse Response

[App page](https://appshunter.io/ios/app/room-impulse-response/id805907763)

Analyze the acoustic properties of rooms and loudspeakers. Record impulses or swept sines to generate Impulse Responses (IRs) and visualize various acoustic metrics like RT60, EDT, and clarity. Perform spectral analysis with FFT for detailed sound decay visualization.

**Highlights:** Record impulse or swept sine, Generate Impulse Response (IR), View ETC with RT60 cursors, Analyze Schroeder curve (EDT, T10, T20, T30), Spectral analysis with FFT, 3D waterfall plot for sound decay

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reference Curves Option | $14.99 | one-time |


### ChordUp

[App page](https://appshunter.io/ios/app/chordup/id1058553903)

This app is a musical instrument and MIDI controller that lets you play common chords instantly with a single touch. It offers multiple playing surfaces for chords, single notes, or strumming, and can control other music apps on the same or different devices.

**Highlights:** Instant chord selection with single touch, Play full chords, single notes, or strum, Control other music apps via MIDI, 108 available chords, 10 embedded instruments, Smart sustain and chord locking

**In-app purchases:** none


## Frequently asked questions

### Is Room Impulse Response free?

Room Impulse Response costs $49.99, and also offers in-app purchases.

### Is ChordUp free?

ChordUp costs $5.99, with no in-app purchases.

### Do Room Impulse Response or ChordUp have ads?

Neither Room Impulse Response nor ChordUp shows ads.

### Which is updated more often, Room Impulse Response or ChordUp?

Room Impulse Response ships an update every 5 months, and ChordUp every 3 weeks. Most recently, Room Impulse Response was updated on September 16, 2026 and ChordUp on September 21, 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.*