Comparison

Frequency Meter PRO vs Audio Spectrum Analyzer dB RTA

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

Head to head
About

Frequency Meter PRO

Analyze audio frequencies in real-time using your device's microphone. Visualize audio levels, noise, and frequency ranges with a spectrum analyzer and oscilloscope. Export data for further analysis.

Highlights
  • Real-time audio scanning
  • Spectrum analyzer visualization
  • Frequency oscilloscope
  • Adjustable noise threshold
  • Customizable frequency range
  • Export data to CSV
Features
Read full description

Frequency Meter PRO is a comprehensive tool for audio frequency diagnostics. Includes REAL TIME scanning of audio signal from internal or external microphone. *** OUTPUT *** Visualization is done on real like device that shows: - Audio level - Noise Level - Frequency range - Current frequency - Frequency oscilloscope - Spectrum analyzer *** ACCURACY *** Application is calibrated with real tone generator. Working range is around 15 - 22500 Hz, and accuracy around +/- 0.5 %. *** NOISE LIMIT *** You can easily set a limit that removes noise treshold with included trackbar. *** RANGE SELECTION *** Choose minimum and maximum frequency you want to scan. *** EXPORT *** You can export output chart to comma-separated file that you can later analyze with MS Excel or other table processor. Application shares document folder in iTunes. *** SUPPORT*** Please don't hesitate to write us for details or questions: lubomir.havran@gmail.com

About

Audio Spectrum Analyzer dB RTA

Analyze sound frequencies and decibel levels with this advanced tool. Ideal for tuning audio systems, it offers real-time spectrum analysis and sound metering for various applications.

Highlights
  • Octave Band Real-Time Analyzer
  • FFT Plot - Fast Fourier Transform
  • Integrated Sound Level Meter (dB-A)
  • Multispectral Harmonic Analyzer
  • Hold Max and Min Peaks
  • Various Window Functions
Features
Read full description

Spectrum Analyzer is full of fantastic advanced features you won’t find elsewhere easily! This app offers a fast and accurate spectrum analysis suitable for both amateur hi-fi enthusiasts and professional A/V engineers. This incredibly precise, pro level tool is perfect for tuning your home cinema, car stereo, subwoofers, and more. Spectrum analyser gives insight into your sounds and deconstructs the audio spectrum, showing the levels of the various frequencies in your audio signal. The built-in sound meter provides high-quality measurement results when measuring ambient noise levels in a multitude of real-life scenarios. Features include- ● Octave Band Real-Time Analyzer ● FFT Plot - Fast Fourier Transform ● Smooth HD Graphics ● Multispectral Harmonic Analyzer ● Integrated Sound Level Meter (dB-A weighted) FFT Features ● FFT size from 256 to incredible 16384 ● Hold Max and (unique feature) Min peaks ● Linear and Logarithm scales ● Various window functions: Rectangle, Hanning, Hamming, Tukey, Cosine, Lanczos, Blackman ● Max frequency live tracking ● Selected frequency live tracking ● Fullscreen mode Octave RTA features ● Bars and unique spline plot modes ● Full, 1/3, 1/6 octave modes ● Hold max mode ● Selected bar tracking. And much more... Please feel free to contact us with any questions, problems or ideas via e-mail support@lspapps.com. Privacy Policy - https://www.iubenda.com/privacy-policy/42622625 Terms of Use https://www.iubenda.com/terms-and-conditions/42622625

Screenshots

Frequency Meter PRO3 screens
Audio Spectrum Analyzer dB RTA3 screens

Verdict

The call

The clearest difference is price: Audio Spectrum Analyzer dB RTA at Free against Frequency Meter PRO's $2.99. Audio Spectrum Analyzer dB RTA also leads on rating (4.5 vs 1.8) and review sentiment (44% vs 15%). Frequency Meter PRO's advantage is in-app purchases (none vs 2) and iOS requirement (8.0 vs 15). On update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Audio Spectrum Analyzer dB RTA is free to download; Frequency Meter PRO costs $2.99 up front. Audio Spectrum Analyzer dB RTA sells 2 in-app purchases, starting at $1.99 per month. Frequency Meter PRO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Audio Spectrum Analyzer dB RTA holds the better App Store score, 4.5 against 1.8. That said, the two scores are not equally well evidenced: Audio Spectrum Analyzer dB RTA has 3K ratings behind it against 30, so its average is the more settled of the two. Written reviews point the same way: 15% of Frequency Meter PRO's written reviews are positive against 44% of Audio Spectrum Analyzer dB RTA's.

UpkeepUpdate frequency

Frequency Meter PRO ships an update every 4 months, Audio Spectrum Analyzer dB RTA every 5 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

Scorecard7 real differences · 3 level
Frequency Meter PRO versus Audio Spectrum Analyzer dB RTA: the parameters behind the verdict, then further details
ParameterFrequency Meter PROAudio Spectrum Analyzer dB RTA
Price$2.99Free — better
Rating1.8 (30 ratings)4.5 (3K ratings) — better
Positive reviews14.7% of reviews43.6% of reviews — better
Number of ratings303K — better
Update frequencyEvery 4 months — betterEvery 5 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15
Further details — not scored
Size3 MB24 MB
Age rating4+4+
DeveloperLubomir Havran BINARTSMarina Polyanskaya

Customer experience

Frequency Meter PRO

All ratings30 ratings
Positive13.3%
Neutral10.0%
Negative76.7%
Written reviews75 reviews
Positive14.7%
Neutral6.7%
Negative78.7%

Audio Spectrum Analyzer dB RTA

All ratings3,042 ratings
Positive87.7%
Neutral4.1%
Negative8.2%
Written reviews484 reviews
Positive43.6%
Neutral7.4%
Negative49.0%

User reviews

Frequency Meter PRO

From 30 App Store ratings

What we love

  • ✨ Identifies frequency quickly
  • 💡 Can filter sound frequencies
  • 💡 Detects harmonics
  • 💡 Useful for ultrasonic devices
  • 💡 Can be used to tune instruments

Room to improve

  • ❌ Inaccurate readings
  • ❌ Not a reliable frequency meter
  • ❌ Fake, toy, not a frequency meter
  • ❌ Useless for tuning
  • ❌ Waste of money

Audio Spectrum Analyzer dB RTA

From 3K App Store ratings

What we love

  • 🚀 Excellent audio analysis tool
  • 👍 Clean and intuitive interface
  • 💡 Customizable frequency range
  • 🔍 Accurate real-time spectrum visualization

Room to improve

  • 🐛 Compatibility issues with newer iOS versions
  • 🔁 Constant prompts to upgrade to Pro version
  • 🔌 High battery consumption
  • 📊 Inaccurate frequency tracking in some modes

Bugs and requests

Frequency Meter PRO

Reported bugs

25 issues
  • Sticks on a reading
  • Below C4 indicates wrong notes
  • Frequency range indicated when NOISE indicator is ON
  • Fails to change output when tone changes
  • Works only if shut down and restarted
Show 20 more
  • App crashes on open
  • App worked only once, now nothing happens
  • Crashes ever since the update
  • Crashing at the push of a button
  • Meter freezes
  • Locks up after 3-5 seconds
  • Buttons don't work
  • App closes when buttons are pressed
  • Cannot download
  • Ne fonctionne pas sur iPad mini, pas d accès au micro
  • Threshold sliders don't work as expected
  • App doesn't read frequency and gives out odd numbers
  • Barely works
  • Crashes frequently
  • Doesn't work on anything but a pure sine wave
  • Fails to work on current iOS version
  • Freezes every time I use it
  • Does not work at all
  • Random numbers displayed
  • Sometimes determines frequency well, other times completely wrong

Requested features

15 requests
  • Include a short/simple manual
  • Explain how to find CSV file in iTunes
  • Update with accuracy fix
  • Allow measurement of frequencies above 20kHz
  • Add help function for operation
Show 10 more
  • Improve display readability
  • Add option to filter background noise
  • Allow selection of recording intervals
  • Add real-time display of all main frequencies
  • Allow filtering of frequencies in a certain range
  • Include instructions in updates
  • Increase size of data presentation screen
  • Support for iPhone 5 resolution
  • More control over frequency filtering
  • Dark mode option

Audio Spectrum Analyzer dB RTA

Reported bugs

3 issues
  • Freezing and crashing on certain devices
  • Incorrect frequency readings in Octave RTA mode
  • Inability to switch between microphone sources

Requested features

4 requests
  • External microphone support
  • Ability to save and compare measurement results
  • More detailed instructions and tutorials
  • Vertical orientation option

In-app purchases

None

Frequency Meter PRO

No in-app purchases

2 purchases

Audio Spectrum Analyzer dB RTA

Subscriptions1
  • Premium Access3 Days trial$1.991 Month
One-time1
  • Spectrum Analyzer Pro$7.99

Questions

Is Frequency Meter PRO free?
Frequency Meter PRO costs $2.99, with no in-app purchases.
Is Audio Spectrum Analyzer dB RTA free?
Audio Spectrum Analyzer dB RTA is free to download, with in-app purchases available.
Which has better reviews, Frequency Meter PRO or Audio Spectrum Analyzer dB RTA?
Audio Spectrum Analyzer dB RTA is rated higher. Frequency Meter PRO averages 1.8 out of 5 from 30 ratings, while Audio Spectrum Analyzer dB RTA averages 4.5 from 3K ratings.
Do Frequency Meter PRO or Audio Spectrum Analyzer dB RTA have ads?
Neither Frequency Meter PRO nor Audio Spectrum Analyzer dB RTA shows ads.
Which is updated more often, Frequency Meter PRO or Audio Spectrum Analyzer dB RTA?
Frequency Meter PRO ships an update every 4 months, and Audio Spectrum Analyzer dB RTA every 5 months. Most recently, Frequency Meter PRO was updated on September 24, 2026 and Audio Spectrum Analyzer dB RTA on September 22, 2026.

Other comparisons