SPL Meter vs Document Wallet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SPL Meter
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.
- Real-time decibel measurement
- Intuitive gauge display
- Noise level explanations
- Recording functionality
- Track noise variations
- Hearing protection guidance
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noiseDB is a professional noise measurement tool that helps you monitor ambient noise levels in real-time. Through precise decibel measurements, you can understand the intensity of noise you're exposed to in daily life, protecting your hearing health. The app features an intuitive gauge display, detailed noise level explanations, and recording functionality that allows you to track noise variations across different locations and times. Whether you're checking your work environment, home noise levels, or evaluating sound levels in public spaces, noiseDB is your ideal choice. Understand noise and protect your hearing with noiseDB. This app is using the standard Apple Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Document Wallet
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Smart OCR reader and classification. PDF converter for multi-pages document. Travel journey management features. Family management features. Profile-based organization features. Reminder for creating, gathering or renewal document.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SPL Meter | Document Wallet |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (11 ratings) — better | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 5 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 9 MB | 106 MB |
| Age rating | 4+ | 4+ |
| Developer | 金红 李 | Hoai Linh Nguyen |
In-app purchases
SPL Meter
- Unlimited access$1.997 Days
- Unlimited access$9.991 Year
Document Wallet
No in-app purchases
Questions
Is SPL Meter free?
Is Document Wallet free?
Do SPL Meter or Document Wallet have ads?
Which is updated more often, SPL Meter or Document Wallet?
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