# Decibel Meter dB Spectrum vs WidPass

The clearest difference is in-app purchases: WidPass at none against Decibel Meter dB Spectrum's 4. WidPass also leads on update cadence (every 10 days vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Decibel Meter dB Spectrum sells 4 in-app purchases, starting at $2.99 per 7 days. WidPass asks for nothing beyond the download.

Decibel Meter dB Spectrum ships an update every 6 months, WidPass every 10 days. The most recent releases landed on October 20, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Decibel Meter dB Spectrum | WidPass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/widpass-qr-and-barcode-widget/id6768950302/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 10 days** |
| Monetization | — | Free |
| Size | 7 MB | 4 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ahmet Giray Ucar](https://appshunter.io/developer/1583246836) | [mongdaewon](https://appshunter.io/developer/1882283495) |

## What reviewers say

### Decibel Meter dB Spectrum

[App page](https://appshunter.io/ios/app/decibel-meter-db-spectrum/id6747271171)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Desibel Weekly Discounted | $2.99 | per 7 days |
| Desibel Meter Pro Weekly | $3.99 | per 7 days |
| Desibe Meter Pro Monthly | $9.99 | per month |
| Desibel Meter Pro Yearly | $29.99 | per year |


### WidPass

[App page](https://appshunter.io/ios/app/widpass-qr-and-barcode-widget/id6768950302)

Organize all your QR codes and barcodes, like loyalty cards and coupons, in one convenient place. Add them via photos and access them instantly from your home screen widget. The app automatically maximizes screen brightness for easy scanning.

**Highlights:** Store QR codes and barcodes, Home screen widget access, Automatic brightness adjustment, Local data storage, No account required

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter dB Spectrum free?

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

### Is WidPass free?

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

### Do Decibel Meter dB Spectrum or WidPass have ads?

Neither Decibel Meter dB Spectrum nor WidPass shows ads.

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

Decibel Meter dB Spectrum ships an update every 6 months, and WidPass every 10 days. Most recently, Decibel Meter dB Spectrum was updated on October 20, 2026 and WidPass on October 31, 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.*