# Apuissance3 vs Decibel Reader

The clearest difference is in-app purchases: Apuissance3 at none against Decibel Reader's 6. Apuissance3 also leads on ads (none vs shown). Decibel Reader's advantage is update cadence (every 2 weeks vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Decibel Reader sells 6 in-app purchases, starting at $3.99 per 7 days. Apuissance3 asks for nothing beyond the download.

Apuissance3 ships an update every 3 months, Decibel Reader every 2 weeks. The most recent releases landed on September 26, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Apuissance3 | Decibel Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (24 ratings)](https://appshunter.io/ios/app/decibel-reader/id6451411046/reviews)** |
| Number of ratings | — | **24** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 12 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APuissance3](https://appshunter.io/developer/1535006729) | [Andy Sutanto](https://appshunter.io/developer/1659282966) |

## What reviewers say

### Apuissance3

[App page](https://appshunter.io/ios/app/apuissance3/id1535006727)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibel Reader

[App page](https://appshunter.io/ios/app/decibel-reader/id6451411046)

Measure ambient noise levels with real-time readings, tracking minimum, average, and maximum decibels. Offers calibration for accuracy and a dark mode for comfortable viewing. This tool helps you understand your sound environment.

**Highlights:** Real-time decibel measurement, Calibration for accuracy, Track min, average, and max noise levels, Dark mode for low-light use, Simple and intuitive interface

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel Meter Pro - 1 Week | $3.99 | per 7 days |
| Decibel Meter Pro - 1 Month | $7.99 | per month |
| Sound Level Meter - 6 Months | $19.99 | per 6 months |
| Noise Level Meter - 1 Year | $29.99 | per year |
| Decibel Meter Pro - 1Y 2 | $29.99 | per year |
| dB Meter Pro | $49.99 | one-time |


## Frequently asked questions

### Is Apuissance3 free?

Apuissance3 is free to download, with no in-app purchases.

### Is Decibel Reader free?

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

### Do Apuissance3 or Decibel Reader have ads?

Decibel Reader shows ads; Apuissance3 does not.

### Which is updated more often, Apuissance3 or Decibel Reader?

Apuissance3 ships an update every 3 months, and Decibel Reader every 2 weeks. Most recently, Apuissance3 was updated on September 26, 2026 and Decibel Reader on September 18, 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.*