# SPL Meter vs Document Wallet

The clearest difference is in-app purchases: Document Wallet at none against SPL Meter's 2. Document Wallet also leads on update cadence (every 10 days vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SPL Meter sells 2 in-app purchases, starting at $1.99 per 7 days. Document Wallet asks for nothing beyond the download.

SPL Meter ships an update every 5 weeks, Document Wallet every 10 days. The most recent releases landed on October 11, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | SPL Meter | Document Wallet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (11 ratings)](https://appshunter.io/ios/app/spl-meter-dbtracker/id6742470686/reviews)** | — |
| Number of ratings | **11** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 106 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [金红 李](https://appshunter.io/developer/1781133144) | [Hoai Linh Nguyen](https://appshunter.io/developer/1669151920) |

## What reviewers say

### SPL Meter

[App page](https://appshunter.io/ios/app/spl-meter-dbtracker/id6742470686)

This tool measures ambient noise levels in real-time, providing decibel readings to help you understand noise intensity and protect your hearing. It features an intuitive gauge, explanations of noise levels, and recording capabilities to track variations across locations and times.

**Highlights:** Real-time decibel measurement, Intuitive gauge display, Noise level explanations, Recording functionality, Track noise variations, Hearing protection guidance

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $1.99 | per 7 days |
| Unlimited access | $9.99 | per year |


### Document Wallet

[App page](https://appshunter.io/ios/app/document-wallet/id6762514471)

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

**In-app purchases:** none


## Frequently asked questions

### Is SPL Meter free?

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

### Is Document Wallet free?

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

### Do SPL Meter or Document Wallet have ads?

Neither SPL Meter nor Document Wallet shows ads.

### Which is updated more often, SPL Meter or Document Wallet?

SPL Meter ships an update every 5 weeks, and Document Wallet every 10 days. Most recently, SPL Meter was updated on October 11, 2026 and Document Wallet on September 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*