# InterLock vs Decibel Meter dB

The clearest difference is in-app purchases: InterLock at none against Decibel Meter dB's 5. InterLock also leads on iOS requirement (10.0 vs 18). Decibel Meter dB's advantage is update cadence (weekly vs every 25 months). On price, ads and device support there is nothing between them.

Both are free to download. Decibel Meter dB sells 5 in-app purchases, starting at $3.99 per 7 days. InterLock asks for nothing beyond the download.

InterLock ships an update every 25 months, Decibel Meter dB weekly. The most recent releases landed on September 29, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | InterLock | Decibel Meter dB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decibel-meter-db-noise-level/id6778000621/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 25 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 22 MB | 21 MB |
| Requires iOS | **10.0** | 18 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Justec(shenzhen)Co.,Ltd](https://appshunter.io/developer/1207703452) | [NEONIQUE YAZILIM VE TEKNOLOJI HIZMETLERI ANONIM SIRKETI](https://appshunter.io/developer/1878428183) |

## What reviewers say

### InterLock

[App page](https://appshunter.io/ios/app/interlock/id1474177115)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibel Meter dB

[App page](https://appshunter.io/ios/app/decibel-meter-db-noise-level/id6778000621)

This tool measures real-time sound levels, providing current, minimum, average, and maximum readings. It allows users to save sessions, export reports, and even overlay sound data onto photos and videos for documentation. It also tracks noise dose and time-weighted averages for extended measurements.

**Highlights:** Real-time dB meter, Save and export measurement history, Camera overlay for photos/videos, Noise dose and time-weighted average tracking, Informational reference tool

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly - Decibel Meter,Noise | $3.99 | per 7 days |
| Monthly - Decibel Meter,Noise | $5.99 | per month |
| Decibel Meter dB: Noise Level Ultra | $6.99 | per 7 days |
| Decibel Meter Pro Yearly | $19.99 | per year |
| Annual - Decibel Meter,Noise | $19.99 | per year |


## Frequently asked questions

### Is InterLock free?

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

### Is Decibel Meter dB free?

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

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

Neither InterLock nor Decibel Meter dB shows ads.

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

InterLock ships an update every 25 months, and Decibel Meter dB weekly. Most recently, InterLock was updated on September 29, 2026 and Decibel Meter dB on October 13, 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.*