Decibel Pro vs CHC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decibel Pro
Transform your device into a professional sound level meter and noise dosimeter. Track real-time audio levels, monitor daily noise exposure, and generate detailed reports with photos and videos. Customize settings for various environments and receive alerts for loud noises.
- Real-time sound level readings (dBA, dBC, dB)
- Noise dosimeter with OSHA/NIOSH standards
- Background measurement with Live Activity
- Save and export measurements (PDF, CSV)
- Photos/videos with sound level stamps
- Customizable alerts and profiles
- Sync with Apple Health
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Decibel Pro turns your iPhone or iPad into a sound level meter and noise dosimeter. See how loud it is right now, how much noise you have taken in today, and keep a record you can show to others. SOUND LEVEL METER • Real-time readings in dBA, dBC or unweighted dB • Average (Leq), minimum, maximum and peak for every measurement • Slow, Fast and Impulse response times, as defined by IEC 61672 • Every level explained in plain words, from quiet to harmful • A live chart of the level and an octave-band spectrum NOISE DOSIMETER • Your daily noise dose against the OSHA or NIOSH standard • TWA, maximum level, projected dose and the time left at the current level • Keeps measuring in the background, with a Live Activity on the Lock Screen and in the Dynamic Island LIBRARY AND REPORTS • Save measurements with their time and, if you like, their location • Search and compare measurements, shifts, photos and videos • Export as PDF or CSV • Photos and videos with the sound level stamped on them SUMMARY AND ALERTS • Your daily exposure over 7 and 30 days, with the 7-day average and the noisiest day • A loud noise alert at the threshold you choose • A weekly summary • Sync with Apple Health SET UP FOR HOW YOU USE IT • Profiles for General, Work & Shift, Sensitive Hearing, Sleep & Kids, Stage & Studio and Log & Evidence set up the Lock Screen card and alerts for you • Home Screen widgets • Calibration against a reference meter • A glossary and a reference chart of everyday sounds • Designed for iPad as well as iPhone ABOUT ACCURACY iPhone and iPad microphones are most reliable between about 30 and 100 dB; louder sounds can be clipped by the hardware. Decibel Pro is for information only and does not replace a certified sound level meter. Questions or ideas: ealtaca@gmail.com Privacy Policy: https://altaca.notion.site/Decibel-Pro-Privacy-Policy-407dd1c646a0805997f4fc99a96eba4b Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
CHC
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The CHC app provides essential products for your family. As a small convenience store, you can use the app to buy essential products for you and your family without having to go out.
Screenshots
Verdict
The clearest difference is update cadence: CHC at daily against Decibel Pro's every 36 months. CHC also leads on iOS requirement (12.0 vs 16.1). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
Decibel Pro ships an update every 36 months, CHC daily. The most recent releases landed on November 4, 2026 and October 4, 2026 respectively.
| Parameter | Decibel Pro | CHC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (75 ratings) — better | — |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 75 — better | — |
| Update frequency | Every 36 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Emre Can Altaca | GLOBAL CONSUMERS CONSULTING SERVICES JOINT STOCK COMPANY |
In-app purchases
Decibel Pro
No in-app purchases
CHC
No in-app purchases









