# Decibel Meter vs SignalScope Basic 2020

The clearest difference is price: Decibel Meter at Free against SignalScope Basic 2020's $59.99. Decibel Meter also leads on ratings volume (907 vs 1) and update cadence (every 2 weeks vs every 6 weeks). SignalScope Basic 2020's advantage is review sentiment (100% vs 57%) and rating (5.0 vs 4.3). On device support and iOS requirement there is nothing between them.

Decibel Meter is free to download; SignalScope Basic 2020 costs $59.99 up front. Decibel Meter sells 8 in-app purchases, starting at $1.99 per 7 days. SignalScope Basic 2020 asks for nothing beyond the download.

SignalScope Basic 2020 holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Decibel Meter has 907 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 57% of Decibel Meter's written reviews are positive against 100% of SignalScope Basic 2020's.

Decibel Meter ships an update every 2 weeks, SignalScope Basic 2020 every 6 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Decibel Meter | SignalScope Basic 2020 |
| --- | --- | --- |
| Price | **Free** | $59.99 |
| Rating | [4.3 (907 ratings)](https://appshunter.io/ios/app/decibel-meter-measure-db-level/id1274038012/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/signalscope-basic-2020/id1520683649/reviews)** |
| Number of ratings | **907** | 1 |
| Positive reviews | 56.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 107 MB | 9 MB |
| Requires iOS | **13** | 13.2 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [文波 曾](https://appshunter.io/developer/1557199654) | [Faber Acoustical, LLC](https://appshunter.io/developer/284781780) |

## What reviewers say

### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-measure-db-level/id1274038012)

Transform your phone into a professional-grade decibel meter for real-time noise detection. Features advanced algorithms, noise visualization, and recording capabilities for comprehensive sound analysis.

**Highlights:** Military-grade algorithm, Professional GB weighted detection, Noise recording, Noise classification system, AI ambient noise visualization, Noise dosimeter

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Free trail then subscribe | $1.99 | per 7 days |
| 分贝测试仪专业版 | $2.99 | per 3 months |
| 分贝仪专业版 | $2.99 | per 7 days |
| 分贝测试仪专业版 | $4.49 | per 6 months |
| Pro Monthly Subscription | $5.49 | per month |
| 分贝测试仪专业版 | $25.99 | per year |
| Remove advertisement | $0.99 | one-time |
| 终身尊享权益 | $29.99 | one-time |

**What reviewers like**

- 👍 Accurate decibel measurements
- 🚀 Easy to use
- 💡 Useful for various applications (e.g. restaurants, heating systems)
- 🚀 Free version works great

**What reviewers complain about**

- 🐛 Inaccurate readings at higher decibel levels
- 🔒 Requires location access for no apparent reason
- 🔒 Excessive ads and subscription model
- 🐛 Compatibility issues (e.g. no iPad support, Chinese EULA)

**Reported bugs**

- Decibel readings capped at 90 dB
- Displaying incorrect address information
- Crashing or freezing on launch
- Showing 70 dB in a completely silent room

**Requested features**

- Landscape mode for iPad
- Ability to detect sounds above 90 dB
- Option to disable ads or switch to a paid version


### SignalScope Basic 2020

[App page](https://appshunter.io/ios/app/signalscope-basic-2020/id1520683649)

This app provides essential tools for engineers, students, and hobbyists to analyze acoustics, audio, and electronics. It offers features like oscilloscopes, FFT analyzers, and spectrograms for detailed signal measurement and calibration.

**Highlights:** Signal analysis from audio input, Engineering unit assignment and calibration, Support for digital accelerometers and microphones, Frequency response correction, Adjustable audio sample rates, Data saving to CSV, TXT, and MAT files, Oscilloscope, FFT, Spectrogram, and XY Plotter tools

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter free?

Decibel Meter is free to download, with in-app purchases available.

### Is SignalScope Basic 2020 free?

SignalScope Basic 2020 costs $59.99, with no in-app purchases.

### Which has better reviews, Decibel Meter or SignalScope Basic 2020?

SignalScope Basic 2020 is rated higher. Decibel Meter averages 4.3 out of 5 from 907 ratings, while SignalScope Basic 2020 averages 5.0 from 1 ratings.

### Do Decibel Meter or SignalScope Basic 2020 have ads?

Decibel Meter shows ads; SignalScope Basic 2020 does not.

### Which is updated more often, Decibel Meter or SignalScope Basic 2020?

Decibel Meter ships an update every 2 weeks, and SignalScope Basic 2020 every 6 weeks. Most recently, Decibel Meter was updated on November 6, 2026 and SignalScope Basic 2020 on November 3, 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.*