# Frequency Meter PRO vs Audio Spectrum Analyzer dB RTA

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.

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.

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.

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.

## The numbers

| Metric | Frequency Meter PRO | Audio Spectrum Analyzer dB RTA |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [1.8 (30 ratings)](https://appshunter.io/ios/app/frequency-meter-pro/id559840622/reviews) | **[4.5 (3K ratings)](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790/reviews)** |
| Number of ratings | 30 | **3K** |
| Positive reviews | 14.7% of reviews | **43.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3 MB | 24 MB |
| Requires iOS | **8.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lubomir Havran BINARTS](https://appshunter.io/developer/557200855) | [Marina Polyanskaya](https://appshunter.io/developer/1519482916) |

## What reviewers say

### Frequency Meter PRO

[App page](https://appshunter.io/ios/app/frequency-meter-pro/id559840622)

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:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- 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

**Requested features**

- 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


### Audio Spectrum Analyzer dB RTA

[App page](https://appshunter.io/ios/app/audio-spectrum-analyzer-db-rta/id1281873790)

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:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $1.99 | per month |
| Spectrum Analyzer Pro | $7.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**Requested features**

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


## Frequently asked 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.

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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.*