Comparison

Audio Spectrum Analyzer Pro vs Feedback Trainer

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

Head to head
About

Audio Spectrum Analyzer Pro

Analyze sound frequencies in real-time with this powerful tool. It offers detailed octave band analysis, FFT plots, and various measurement scales. Supports multiple microphones and noise analysis features for accurate audio insights.

Highlights
  • Octave Band Real Time Analyzer
  • FFT Plot (Fast Fourier Transform)
  • Sound level meter (dB meter)
  • Noise Rating and Noise Criterion support
  • Support for external microphones
  • Pre-calibrated mic profiles
Features
Read full description

Audio Spectrum Analyzer is a powerful real-time audio analysis app. Full of features yet very simple to use. Sound level meter (db meter a-weighted, noise rating, noise criterion) included. Feature Highlights: • Octave Band Real Time Analyzer • FFT Plot (Fast Fourier Transform) • Linear and logarithm scales • Up to 16384 FFT size • A lot of available window functions • Tracking for max value • Max and Min for any selected frequency • Stunned graphics • Reliable measurement accuracy with pre-calibrated profiles for 3 device-integrated mics • Additional precision with integrated support and pre-calibrated profiles for AirPods, AirPods Pro • Safer measurements using the Airpods Pro noise cancellation feature • Support for external microphones (wired or via Bluetooth) • Noise Rating and Noise Criterion support And many many more... Terms of Use: https://www.iubenda.com/terms-and-conditions/94359518

About

Feedback Trainer

Features
Read full description

A frequency ear training app for PA engineers and audio professionals. The ability to quickly identify problem frequencies that cause feedback is a skill built through experience. Train your ears with this app and sharpen your instincts for the stage and studio. Features Visual learning with a 31-band graphic EQ display Two modes: Phone-Friendly (100Hz–16kHz) and Full Range for external speakers (40Hz–16kHz) Hint mode for beginners Track your accuracy and progress history Available in Japanese, English, Chinese, French, and Spanish

Screenshots

Audio Spectrum Analyzer Pro4 screens
Feedback Trainer4 screens

Verdict

The call

The clearest difference is in-app purchases: Feedback Trainer at none against Audio Spectrum Analyzer Pro's 2. Feedback Trainer also leads on update cadence (every 2 weeks vs every 7 months). Audio Spectrum Analyzer Pro's advantage is ads (none vs shown) and iOS requirement (13.0 vs 16.6). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Audio Spectrum Analyzer Pro sells 2 in-app purchases, starting at $19.99 per year. Feedback Trainer asks for nothing beyond the download.

UpkeepUpdate frequency

Audio Spectrum Analyzer Pro ships an update every 7 months, Feedback Trainer every 2 weeks. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
Audio Spectrum Analyzer Pro versus Feedback Trainer: the parameters behind the verdict, then further details
ParameterAudio Spectrum Analyzer ProFeedback Trainer
PriceFreeFree
Rating4.4 (238 ratings) — better—
Positive reviews57.4% of reviews—
Number of ratings238 — better—
Update frequencyEvery 7 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.6
Further details — not scored
Size40 MB4 MB
Age rating4+4+
DeveloperVlad PolyanskiyShunsuke Takasu

Bugs and requests

Audio Spectrum Analyzer Pro

Reported bugs

11 issues
  • App crashes on iOS 16 and iOS 26 launches
  • FFT resolution not working after iOS updates
  • Graph display freezes or becomes unresponsive
  • Spectrograph mode too slow on newer iPhones
  • Frequency alignment issues with dynamic display
Show 6 more
  • App won't uninstall properly
  • Malware warnings appearing
  • Help links and support pages broken/dead
  • Incorrect dB level readings (off by ~20dB)
  • Recording functions non-functional
  • Half black screen in certain orientations

Requested features

11 requests
  • Audio file upload capability
  • White noise/test signal generator
  • Microphone calibration file support
  • Recording functionality with timestamp
  • Multiple frequency cursors for comparison
Show 6 more
  • Ability to compare before/after curves
  • Adjustable dB level zoom/scaling
  • Saved settings and personalizations
  • Audio Unit (AUV3) plugin support
  • Peak hold reset button
  • Time-domain recording in spectrograph mode

Feedback Trainer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Audio Spectrum Analyzer Pro

Subscriptions1
  • Premium Mode7 Days trial$19.991 Year
One-time1
  • Premium Pack$29.99
None

Feedback Trainer

No in-app purchases

Questions

Is Audio Spectrum Analyzer Pro free?
Audio Spectrum Analyzer Pro is free to download, with in-app purchases available.
Is Feedback Trainer free?
Feedback Trainer is free to download, with no in-app purchases.
Do Audio Spectrum Analyzer Pro or Feedback Trainer have ads?
Feedback Trainer shows ads; Audio Spectrum Analyzer Pro does not.
Which is updated more often, Audio Spectrum Analyzer Pro or Feedback Trainer?
Audio Spectrum Analyzer Pro ships an update every 7 months, and Feedback Trainer every 2 weeks. Most recently, Audio Spectrum Analyzer Pro was updated on September 24, 2026 and Feedback Trainer on September 10, 2026.

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