# Molnus vs Decibel Meter Ultra

The clearest difference is review sentiment: Decibel Meter Ultra at 43% against Molnus's 13%. Molnus's advantage is monetization model (free vs free with in-app purchases) and device support (3 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Molnus sells 3 one-off in-app purchases and Decibel Meter Ultra sells 4 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Molnus ships an update fortnightly, Decibel Meter Ultra every 10 days. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Molnus | Decibel Meter Ultra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (2.6K ratings)](https://appshunter.io/ios/app/decibel-meter-ultra/id1643525961/reviews)** |
| Number of ratings | — | **2.6K** |
| Positive reviews | 12.5% of reviews | **43.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 92 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | +12 |
| Developer | [HJL IT & Development](https://appshunter.io/developer/1368468190) | [Ultrafine](https://appshunter.io/developer/1558108175) |

## What reviewers say

### Molnus

[App page](https://appshunter.io/ios/app/molnus/id1368468281)

Control and manage compatible cameras and their associated SIM cards. Receive instant notifications for events like image uploads and battery status, with secure cloud storage for your photos.

**Highlights:** Remote camera settings control, MolnusSIM card management, Event notifications (image upload, battery), Secure cloud storage, Wildlife detection, Photo gallery

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Molnus Credits | $3.99 | one-time |
| 200 Molnus Credits | $7.99 | one-time |
| 500 Molnus Credits | $19.99 | one-time |


### Decibel Meter Ultra

[App page](https://appshunter.io/ios/app/decibel-meter-ultra/id1643525961)

Measure, record, and analyze sound levels in your environment. This app offers precision metering, noise elimination tools, hearing protection features, and home audio calibration. It provides detailed reports and can be used with device microphones or external ones.

**Highlights:** Precision sound level metering, Noise logging and reporting, Hearing protection dosimeter, Fractional octave band analysis, Real-time analyzer, External microphone support

**Features:** iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Access | $7.99 | per 7 days |
| PRO Access | $11.99 | per month |
| PRO Access | $39.99 | per year |
| PRO Access | $39.99 | per year |

**What reviewers like**

- 🎨 Aesthetically pleasing design
- 🔍 Useful noise monitoring features
- 🔍 Ability to collect noise evidence

**What reviewers complain about**

- 💰 Expensive subscription pricing
- 🚫 Misleading free trial claims
- 🚫 Difficult to cancel subscription
- 🔍 Inconsistent noise level readings

**Reported bugs**

- Subscription charges continue after cancellation
- Subscription cancellation page doesn't load

**Requested features**

- Lower subscription pricing
- Improve subscription cancellation process


## Frequently asked questions

### Is Molnus free?

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

### Is Decibel Meter Ultra free?

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

### Do Molnus or Decibel Meter Ultra have ads?

Neither Molnus nor Decibel Meter Ultra shows ads.

### Which is updated more often, Molnus or Decibel Meter Ultra?

Molnus ships an update fortnightly, and Decibel Meter Ultra every 10 days. Most recently, Molnus was updated on November 2, 2026 and Decibel Meter Ultra on November 7, 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.*