# Live Spectrogram vs Physics Toolbox Sensor Suite

The clearest difference is price: Physics Toolbox Sensor Suite at Free against Live Spectrogram's $1.99. Physics Toolbox Sensor Suite also leads on update cadence (weekly vs every 31 months) and ratings volume (1.8K vs 6). Live Spectrogram's advantage is in-app purchases (none vs 1) and chart position (#172 vs unranked). On rating, ads and device support there is nothing between them.

Physics Toolbox Sensor Suite is free to download; Live Spectrogram costs $1.99 up front. Physics Toolbox Sensor Suite sells 1 one-off in-app purchase. Live Spectrogram asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Live Spectrogram against 4.7 for Physics Toolbox Sensor Suite. That said, the two scores are not equally well evidenced: Physics Toolbox Sensor Suite has 1.8K ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 63% of Live Spectrogram's written reviews are positive against 80% of Physics Toolbox Sensor Suite's.

Live Spectrogram ships an update every 31 months, Physics Toolbox Sensor Suite weekly. The most recent releases landed on September 4, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Live Spectrogram | Physics Toolbox Sensor Suite |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/live-spectrogram/id630831185/reviews)** | [4.7 (1.8K ratings)](https://appshunter.io/ios/app/physics-toolbox-sensor-suite/id1128914250/reviews) |
| Number of ratings | 6 | **1.8K** |
| Positive reviews | 62.5% of reviews | **80.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#172** | — |
| Size | 15 MB | 77 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Krueger Systems, Inc.](https://appshunter.io/developer/299293363) | [Chrystian Vieyra](https://appshunter.io/developer/998187453) |

## What reviewers say

### Live Spectrogram

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

**Currently charting:** #172 Top Paid · Utilities (US App Store)

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


### Physics Toolbox Sensor Suite

[App page](https://appshunter.io/ios/app/physics-toolbox-sensor-suite/id1128914250)

This app turns your smartphone into a scientific instrument suite, enabling measurement, recording, analysis, and export of real-time sensor data. It offers tools for kinematics, acoustics, light, magnetism, and more, suitable for students, educators, researchers, and hobbyists.

**Highlights:** Real-time sensor data measurement, Data recording and analysis, Data export functionality, Kinematics tools (accelerometer, gyroscope), Acoustics tools (sound meter, oscilloscope), Magnetism tools (compass, magnetometer), AR visualization for magnetic fields and measurements

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $5.99 | one-time |


## Frequently asked questions

### Is Live Spectrogram free?

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

### Is Physics Toolbox Sensor Suite free?

Physics Toolbox Sensor Suite is free to download, with in-app purchases available.

### Which has better reviews, Live Spectrogram or Physics Toolbox Sensor Suite?

Live Spectrogram is rated higher. Live Spectrogram averages 4.8 out of 5 from 6 ratings, while Physics Toolbox Sensor Suite averages 4.7 from 1.8K ratings.

### Do Live Spectrogram or Physics Toolbox Sensor Suite have ads?

Neither Live Spectrogram nor Physics Toolbox Sensor Suite shows ads.

### Which is updated more often, Live Spectrogram or Physics Toolbox Sensor Suite?

Live Spectrogram ships an update every 31 months, and Physics Toolbox Sensor Suite weekly. Most recently, Live Spectrogram was updated on September 4, 2026 and Physics Toolbox Sensor Suite on September 24, 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.*