# Decibel Meter dB vs Polariss

The clearest difference is price: Polariss at Free against Decibel Meter dB's $3.99. Polariss also leads on update cadence (weekly vs every 4 months). Decibel Meter dB's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads there is nothing between them.

Polariss is free to download; Decibel Meter dB costs $3.99 up front. Polariss sells 1 one-off in-app purchase. Decibel Meter dB asks for nothing beyond the download.

Decibel Meter dB ships an update every 4 months, Polariss weekly. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Decibel Meter dB | Polariss |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decibel-meter-db/id6740335067/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Paid | — |
| Size | 1 MB | 6 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Morten Punnerud](https://appshunter.io/developer/969844397) | [Yutaka Kubota](https://appshunter.io/developer/490646317) |

## What reviewers say

### Decibel Meter dB

[App page](https://appshunter.io/ios/app/decibel-meter-db/id6740335067)

This app provides real-time decibel monitoring with a dynamic visual display and color-coded alerts for different noise thresholds. It helps users track sound levels, understand potential risks, and maintain healthier audio environments. Ideal for various settings, it offers a simple and effective way to stay aware of ambient noise.

**Highlights:** Real-time decibel monitoring, Animated visual ear display, Color-coded noise alerts, 1-minute average tracking, Spectrogram view, Optimized for iPhone and iPad

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

**In-app purchases:** none


### Polariss

[App page](https://appshunter.io/ios/app/polariss/id6757706910)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Polariss Pro | $4.99 | one-time |


## Frequently asked questions

### Is Decibel Meter dB free?

Decibel Meter dB costs $3.99, with no in-app purchases.

### Is Polariss free?

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

### Do Decibel Meter dB or Polariss have ads?

Neither Decibel Meter dB nor Polariss shows ads.

### Which is updated more often, Decibel Meter dB or Polariss?

Decibel Meter dB ships an update every 4 months, and Polariss weekly. Most recently, Decibel Meter dB was updated on November 4, 2026 and Polariss on November 9, 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.*