Comparison

Room Impulse Response vs OB

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

Head to head
About

Room Impulse Response

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
Read full description

Room Impulse Response measures audio characteristics of a room or loudspeaker. Start by recording an impulse, such as a handclap or balloon pop, or record a swept sine and use the built-in deconvolution to create your Impulse Response (IR). Now, view the ETC, with RT60 decay cursors, apply windowing if you wish, or trim the IR. Next, see these other graphs: ** Impulse, where you can play back the actual IR ** ETC, which includes cursors to read out RT60 times directly, and allows pinch-zoom gesture for trimming the file. Apple a window, and see the effects of the window on the ETC plot. ** Schroeder curve, with EDT, T10, T20, and T30 markers And then see these charts, all in either in Octave or 1/3 Octave bands: ** T20 or T30 (RT60) times ** Reverb Early Decay Times (EDT) ** Clarity C50 ** Clarity C80 ** CT times ** Definition ** Signal / Noise And then you can also do spectral analysis, using our FFT, which can be windowed, for analyzing loudspeaker response without reflections, or see the 3D waterfall plot to view the decay of sound in the room by frequency, over time. Works great with the internal iOS device microphone, or attach or iTestMic or iAudioInterface2 for fully professional results. See the other great apps by Studio Six Digital, including AudioTools.

About

OB

This app recreates a classic vintage synthesizer, offering rich, full-bodied tones for electronic music, recordings, and film scores. It features MPE support, an on-screen MIDI keyboard, and high-quality rendering for enhanced music production.

Highlights
  • Oberheim OB-X emulation
  • MPE support
  • On-screen MIDI keyboard
  • High-quality retina rendering
  • AUv3 improvements
  • Preset search with categories
Features
Read full description

OB-Xd is a classic synthesizer that captivates musicians with its rich, full-bodied tones and expansive sound design. Perfect for adding a vintage touch to electronic tracks, live recordings, or film scores, OB-Xd brings unique and expressive qualities to your music. Designed to recreate the Oberheim OB-X, it features enhancements like micro random detuning and unison for a fuller sound. Elevate your studio setup and music production with OB-Xd today. • Full MPE support with configurable pitch bend, aftertouch, timbre, and pressure depth. • On-screen MIDI keyboard with pitch bend and mod wheels (iPad only). • Native iOS popups, dialogs, and text input throughout the interface. • Search Presets with category subfolders and native no-results dialog. • High-quality retina rendering. • AUv3 improvements: async file choosers, host viewport resize, and Bluetooth MIDI access.

Screenshots

Room Impulse Response4 screens
OB2 screens

Verdict

The call

The clearest difference is review sentiment: OB at 75% against Room Impulse Response's 0%. OB also leads on price ($19.99 vs $49.99) and in-app purchases (none vs 1). On ads, monetization model, device support and iOS requirement there is nothing between them.

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

Room Impulse Response costs $49.99 and OB $19.99 up front. Room Impulse Response sells 1 one-off in-app purchase. OB asks for nothing beyond the download.

UpkeepUpdate frequency

Room Impulse Response ships an update every 5 months, OB every 10 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Room Impulse Response versus OB: the parameters behind the verdict, then further details
ParameterRoom Impulse ResponseOB
Price$49.99$19.99 — better
Rating—4.1 (15 ratings) — better
Positive reviews0.0% of reviews75.0% of reviews — better
Number of ratings—15 — better
Update frequencyEvery 5 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size56 MB210 MB
Age rating4+4+
DeveloperAndrew SmithDiscoDSP LLC

Customer experience

Room Impulse Response

Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

OB

All ratings16 ratings
Positive81.3%
Neutral0.0%
Negative18.8%
Written reviews12 reviews
Positive75.0%
Neutral8.3%
Negative16.7%

In-app purchases

1 purchases

Room Impulse Response

One-time1
  • Reference Curves Option$14.99
None

OB

No in-app purchases

Questions

Is Room Impulse Response free?
Room Impulse Response costs $49.99, and also offers in-app purchases.
Is OB free?
OB costs $19.99, with no in-app purchases.
Do Room Impulse Response or OB have ads?
Neither Room Impulse Response nor OB shows ads.
Which is updated more often, Room Impulse Response or OB?
Room Impulse Response ships an update every 5 months, and OB every 10 days. Most recently, Room Impulse Response was updated on November 1, 2026 and OB on October 30, 2026.

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