iAnalyzer vs Octave RTA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iAnalyzer
This professional audio analysis software uses FFT to examine sound signals on iOS devices. It offers real-time spectrum analysis, precise peak frequency computation, and a unique instrument tuner function. Ideal for musicians and sound engineers seeking detailed audio insights.
- Real-time FFT spectrum analysis
- Octave and 1/3 Octave display
- High precision peak frequency computation
- Instrument tuner function
- Adjustable playback speed
- VGA output support
- Waveform display
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iAnalyzer is a FFT based professional software to analyze the audio signals for iPhone, iPod Touch and iPad. After 10 years of good sales all over the world, we are glad to see that iAnalyzer has gradually become the industry standard in audio analyze field, due to it's very high quality of course. This is definitely a Must Have app for every musician or sound engineer. We also released the Mac version, you can download it from "Mac App Store". Features: -High performance software design for Real Time Analyzing(RTA) and complex graph displaying. -Works on 44K sample rate, 20~20k Hz frequency output. -FFT spectrum, Octave and 1/3 Octave result display. -Colored curve depend on the dB value. -Flex FFT size, 4K, 8K, or 16K. -Reference Pressure configurable. -2D or 3D or Mix 2D&3D display. -History result display while in 3D mode. -High precision peak frequency computation, average-error lower than 0.1%. -Auto peak frequency tracing, up to 3 peaks can be displayed simultaneously and each one be linked from text to the graph clearly. -Frequency to music scale converter, you can use iAnalyzer as a professional instrument tuner, or to test if any sound is tuneful. -Powerful synthesizer to allow you replay the audio with different speed, from 1/8 to 4x. With this feature, you can listen to your recoding very slowly. (Require iPhone 4S and later, iPad 2 and later which shipped with multiple cores processor.) -VGA output support. Sync display on your device and extern screen. (iPhone 4, iPod touch 4 and iPad required) -Current waveform display and summary waveform display. -Record at any position and red color to mark the latest recording, unlimited recording time. -Play back the recording. -Oscope Auto-Scale: Enable you to view more details for low level signal. -Snap to Peak: Find peak more easily while using measure line. -File Manager: Recording in wave format, create new files, delete exist files, etc. -Wifi Transfer and Data exporting: Download wav files with your browser, including screen shot, FFT result in txt file. -Touch in the result area to use the measure line, bordered label means where is a peak. -Move in the waveform area or touch on the bottom of the area to change the current position, iAnalyzer re-compute and update graph automatically. You can also change the position while playing. Note: -The internal mic of iPhone first generation can only works on 8K sample rate, you need head-set to achieve 44k. -Press "File" button to see the HTTP address, it is in the bottom of the window. -For more information, Please visit http://phyar.cn . How to Use: -Touch and move in the result area with one finger to use the measure line. -Touch and move in the result area with 3 fingers to rotate the 3D graph. -Touch and move in the summary waveform area to move the current position. -Tap in the scroll bar area(bottom of screen) to re-seek the current position. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: http://phyar.cn/pp/
Octave RTA
This real-time audio analysis app provides precision measurement and visualization for sound. It's designed for musicians and recording engineers, but useful for anyone interested in sound, especially for room or speaker tuning.
- Full, 1/3, and 1/6 Octave analysis
- Adjustable FFT Size
- Fast, Slow, and Infinite Averaging
- Flat, A, and C weighted modes
- Snapshot overlay for comparison
- Lock mode for peak band tracking
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***** "I use this app when sound checking, does the job, nice & simple to use, can't fault it." - Colin Challinor Octave RTA is a powerful real-time audio analysis app. Designed with musicians and recording engineers in mind, it can also be used by anyone interested in the world of sound. Ideal for room tuning or speaker tuning, the app enables portable, precision audio measurement and visualization. Feature Highlights: ● Full, 1/3 and 1/6 Octave ● FFT Size (2048 to 16384 points) ● Fast, Slow (exponential) and Infinite Averaging ● Toggle between Flat, A and C weighted modes ● Snapshot overlay for quick comparison ● Lock mode to auto track peak band ● Pan to adjust visible dB range ● iPhone X ready Audio credits: "Basement Floor" and "Enchanted Journey" by Kevin MacLeod
Screenshots
Verdict
The clearest difference is price: iAnalyzer at Free against Octave RTA's $9.99. iAnalyzer also leads on update cadence (every 5 months vs every 17 months). Octave RTA's advantage is review sentiment (81% vs 41%) and in-app purchases (none vs 2). On ratings volume, ads 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
iAnalyzer is free to download; Octave RTA costs $9.99 up front. iAnalyzer sells 2 in-app purchases, starting at $4.99 per month. Octave RTA asks for nothing beyond the download.
Octave RTA holds the better App Store score, 4.4 against 4.2. Both are backed by a comparable volume of ratings — 75 and 154 respectively. Written reviews point the same way: 41% of iAnalyzer's written reviews are positive against 81% of Octave RTA's.
iAnalyzer ships an update every 5 months, Octave RTA every 17 months. The most recent releases landed on October 19, 2026 and October 22, 2026 respectively.
| Parameter | iAnalyzer | Octave RTA |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.2 (75 ratings) | 4.4 (154 ratings) — better |
| Positive reviews | 40.5% of reviews | 80.7% of reviews — better |
| Number of ratings | 75 | 154 — better |
| Update frequency | Every 5 months — better | Every 17 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Best chart rank | — | #168 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | 平 陈 | ONYX Apps |
Customer experience
iAnalyzer
Octave RTA
Bugs and requests
iAnalyzer
Not enough reviews yet to summarise bugs or requests.
Octave RTA
Reported bugs
7 issues- Screen flashing/blinking on iPads
- Gain slider not working on some devices
- Microphone permission not appearing in settings
- App not working on iOS 14.2
- Display unstable and flashes wildly
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- Screen flashing when iPad is flipped 180 degrees
- App flickering after updates
Requested features
22 requests- Increase graph resolution (e.g., to 3dB)
- Alternative input sound sources (e.g., lightning audio)
- Standalone Mac app
- Alternative input sound sources (e.g., line in)
- Ability to switch to line input
Show 17 moreShow fewer
- Save and manage frequency graphs as snapshots
- Add a simple sine wave tone generator
- Screen grab feature for graphs
- Ability to record or save data with descriptions
- Option to change display colors
- More advanced features
- Signal generator function
- 1/12th octave resolution
- Ability to work with a higher range of dB
- Zoom functionality for graphs
- 12th and 24th Oct smoothing
- Ability to choose between line and mic inputs on external sound cards
- Gain parameter control
- Normalization or sensitivity adjustment
- Higher resolution (e.g., 1/12 octave)
- Save and manage held frequency graphs
- Text description for screenshots
In-app purchases
iAnalyzer
- iAnalyzer Pro (1 Month)3 Days trial$4.991 Month
- iAnalyzer Pro (1 Year)3 Days trial$29.991 Year
Octave RTA
No in-app purchases









