Decibels Meter vs Cers IoT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Decibels Meter
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Concert Decibel Meter - Your Professional Sound Wave Monitoring Assistant When you're surrounded by the sound waves of a concert or music festival, are you curious about the decibel level? Want to share the electrifying experience with the world? The Concert Decibel Meter is your professional sound wave monitoring assistant. 【Core Functions】 Real-time Decibel Monitoring: Accurately captures and displays the real-time decibel value of the venue. From "rhythm warm-up" to "raging sound waves," it uses the most knowledgeable terms about the venue to intuitively tell you the sound pressure level you're in. Watermark Camera: Built-in camera captures moments directly from the venue. Automatically generates cool watermarks, creating a unique souvenir of your visit. Hardcore Hearing Protection: More than just measurement, it's your intelligent guardian of hearing. When the volume reaches a dangerous level, the app will issue a strong alert, reminding you to immediately activate hearing protection mode.
Cers IoT
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CERs IoT is a smart monitoring app that allows users to view real-time CO₂ and air quality data based on their location. Users can intuitively check air quality conditions and CO₂ concentrations through the app, and analyze trends in data changes over time and across locations from multiple perspectives. CERs IoT visualizes collected IoT sensor data for users through map POIs and graphs. It can be used in various environments, including homes, offices, and public spaces. Key Features - Real-time data viewing via IoT sensor integration - Monitoring of CO₂ levels and air quality - Graphs showing hourly data trends - Location-based environmental data monitoring - Intuitive and user-friendly UI Recommended for: - Users who want to manage indoor air quality and CO₂ levels - Households and offices seeking to maintain a healthy environment - Users interested in utilizing IoT-based environmental data Start managing your environment in a smarter and healthier way with CERs IoT.
Screenshots
Verdict
The clearest difference is update cadence: Decibels Meter at every 9 days against Cers IoT's every 2 months. 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.
Decibels Meter ships an update every 9 days, Cers IoT every 2 months. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.
| Parameter | Decibels Meter | Cers IoT |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 27 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | 剑 罗 | (주)온전히 |
In-app purchases
Decibels Meter
No in-app purchases
Cers IoT
No in-app purchases









