# Live Spectrogram vs Frequency Sound Generator App

The clearest difference is price: Frequency Sound Generator App at Free against Live Spectrogram's $1.99. Frequency Sound Generator App also leads on update cadence (every 2 months vs every 31 months) and ratings volume (4.8K vs 6). Live Spectrogram's advantage is in-app purchases (none vs 2) and ads (none vs shown). On review sentiment and device support there is nothing between them.

Frequency Sound Generator App is free to download; Live Spectrogram costs $1.99 up front. Frequency Sound Generator App sells 2 in-app purchases, starting at $5.99 per 7 days. Live Spectrogram asks for nothing beyond the download.

Live Spectrogram holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Frequency Sound Generator App has 4.8K ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 63% of Live Spectrogram's written reviews are positive against 66% of Frequency Sound Generator App's, so the app with the better star average is not the one people write more warmly about.

Live Spectrogram ships an update every 31 months, Frequency Sound Generator App every 2 months. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Live Spectrogram | Frequency Sound Generator App |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/live-spectrogram/id630831185/reviews)** | [4.5 (4.8K ratings)](https://appshunter.io/ios/app/frequency-sound-generator-app/id1238160553/reviews) |
| Number of ratings | 6 | **4.8K** |
| Positive reviews | 62.5% of reviews | **66.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 31 months | **Every 2 months** |
| Monetization | **Paid** | Subscription |
| Size | 15 MB | 36 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Krueger Systems, Inc.](https://appshunter.io/developer/299293363) | [Min Ku](https://appshunter.io/developer/1204192873) |

## What reviewers say

### Live Spectrogram

[App page](https://appshunter.io/ios/app/live-spectrogram/id630831185)

Visualize sound frequencies in real-time with this tool. It displays audio intensity across time and frequency using color, helping you perfect singing, analyze animal calls, or locate household noises.

**Highlights:** Real-time audio visualization, Frequency analysis, Time-based spectrum display, Intensity shown by color, Singing voice perfection, Animal call analysis, Sound source identification

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Frequency Sound Generator App

[App page](https://appshunter.io/ios/app/frequency-sound-generator-app/id1238160553)

Generate sound frequencies from 1Hz to 25,000Hz with a simple interface. Features include wave visualization, adjustable sensitivity, and multiple waveform options. Use it for hearing tests, pet training, or as a prank tool.

**Highlights:** Frequency range 1Hz to 25,000Hz, Wave visualization, Adjustable sensitivity, Multiple waveforms (Sine, Square, Sawtooth, Triangle), Custom frequency range, Logarithmic and Linear slider modes

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access Weekly Plan | $5.99 | per 7 days |
| Unlimited Access Yearly Plan | $19.99 | per year |

**What reviewers like**

- 👍 Helpful for tinnitus
- 🚀 Accurate frequency generation
- 🎉 Great for meditation and relaxation
- 💡 Useful for testing speaker systems
- 🔍 Ability to test hearing range

**What reviewers complain about**

- 🐛 Difficulty adjusting precise frequencies
- 🔊 Extremely high frequencies can be painful
- 🔋 Stops playing when screen is locked
- 📢 Excessive ads
- 🤔 Mosquito repellent feature not effective

**Reported bugs**

- Frequency slider is overly sensitive
- Displayed frequency doesn't match actual output
- Inconsistent behavior between 'Play' and 'Mode' buttons

**Requested features**

- Option to save favorite frequencies
- Ability to type in specific frequency values
- Background playback support
- Paid ad-free version


## Frequently asked questions

### Is Live Spectrogram free?

Live Spectrogram costs $1.99, with no in-app purchases.

### Is Frequency Sound Generator App free?

Frequency Sound Generator App is free to download, with in-app purchases available.

### Which has better reviews, Live Spectrogram or Frequency Sound Generator App?

Live Spectrogram is rated higher. Live Spectrogram averages 4.8 out of 5 from 6 ratings, while Frequency Sound Generator App averages 4.5 from 4.8K ratings.

### Do Live Spectrogram or Frequency Sound Generator App have ads?

Frequency Sound Generator App shows ads; Live Spectrogram does not.

### Which is updated more often, Live Spectrogram or Frequency Sound Generator App?

Live Spectrogram ships an update every 31 months, and Frequency Sound Generator App every 2 months. Most recently, Live Spectrogram was updated on October 14, 2026 and Frequency Sound Generator App on October 19, 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.*