Comparison

Decibel Pro vs CHC

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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/

About

CHC

Features
Read full description

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

Decibel Pro4 screens
CHC4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Decibel Pro ships an update every 36 months, CHC daily. The most recent releases landed on November 4, 2026 and October 4, 2026 respectively.

Scorecard2 real differences · 8 level
Decibel Pro versus CHC: the parameters behind the verdict, then further details
ParameterDecibel ProCHC
PriceFreeFree
Rating4.4 (75 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings75 — better—
Update frequencyEvery 36 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.112.0 — better
Further details — not scored
Size14 MB40 MB
Age rating4+4+
DeveloperEmre Can AltacaGLOBAL CONSUMERS CONSULTING SERVICES JOINT STOCK COMPANY

In-app purchases

None

Decibel Pro

No in-app purchases

None

CHC

No in-app purchases

Questions

Is Decibel Pro free?
Decibel Pro is free to download, with no in-app purchases.
Is CHC free?
CHC is free to download, with no in-app purchases.
Do Decibel Pro or CHC have ads?
Neither Decibel Pro nor CHC shows ads.
Which is updated more often, Decibel Pro or CHC?
Decibel Pro ships an update every 36 months, and CHC daily. Most recently, Decibel Pro was updated on November 4, 2026 and CHC on October 4, 2026.

Other comparisons