# DJOLT vs Decibel Meter

The clearest difference is in-app purchases: DJOLT at none against Decibel Meter's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Decibel Meter sells 3 in-app purchases, starting at $2.99 per 7 days. DJOLT asks for nothing beyond the download.

DJOLT ships an update fortnightly, Decibel Meter monthly. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | DJOLT | Decibel Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (50 ratings)](https://appshunter.io/ios/app/decibel-meter-db-noise-level/id6744018521/reviews)** |
| Number of ratings | — | **50** |
| Positive reviews | — | 70.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 69 MB | 176 MB |
| Requires iOS | 17.5 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Matthew Johl](https://appshunter.io/developer/1747866453) | [PaoApps](https://appshunter.io/developer/1746019535) |

## What reviewers say

### DJOLT

[App page](https://appshunter.io/ios/app/djolt/id6503046371)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-db-noise-level/id6744018521)

This tool transforms your iPhone into a real-time sound level meter. It measures and displays environmental noise in decibels, helping you monitor sound at home, work, or outdoors. Protect your hearing by detecting loud noises and staying aware of your sound environment.

**Highlights:** Real-time decibel measurement, Dynamic graph display, Min/Max/Average sound levels, Measuring timer, Pause and Reset buttons, Noise pollution checks

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access with Trial | $2.99 | per 7 days |
| Weekly Access | $2.99 | per 7 days |
| Yearly Access | $17.99 | per year |


## Frequently asked questions

### Is DJOLT free?

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

### Is Decibel Meter free?

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

### Do DJOLT or Decibel Meter have ads?

Neither DJOLT nor Decibel Meter shows ads.

### Which is updated more often, DJOLT or Decibel Meter?

DJOLT ships an update fortnightly, and Decibel Meter monthly. Most recently, DJOLT was updated on October 13, 2026 and Decibel Meter on October 17, 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.*