Sound Meter vs Cairos IOT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sound Meter
This utility app measures ambient noise levels in decibels. It provides a reference table to help users understand safe listening levels and protects their hearing. The app also stores historical measurements for later review.
- Measures sound level in decibels
- Decibel level reference table
- Hearing protection guidance
- Stores measurement history
- Easy to use interface
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Sound Meter measures the noise and sound level in decibel. Easy to use. - Decibel level table for reference, helps protect your ears from pain - Store history for any consideration later.
Cairos IOT
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Being a competitive world, our focus should be on performance enhancement. IOT and connected devices gives you the luxury to monitor performance not only of your employees but your assets and provide you with insights on how to enhance performance which provides a competitive edge over your competitors.
Screenshots
Verdict
The clearest difference is in-app purchases: Cairos IOT at none against Sound Meter's 1. On price, update cadence, ads 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. Sound Meter sells 1 one-off in-app purchase. Cairos IOT asks for nothing beyond the download.
Sound Meter ships an update fortnightly, Cairos IOT every 3 weeks. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.
| Parameter | Sound Meter | Cairos IOT |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (16 ratings) — better | — |
| Positive reviews | 40.0% of reviews | — |
| Number of ratings | 16 — better | — |
| Update frequency | Fortnightly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 57 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiep Pham | JARS Services Private Limited |
In-app purchases
Sound Meter
- Remove ADs$4.99
Cairos IOT
No in-app purchases
Questions
Is Sound Meter free?
Is Cairos IOT free?
Do Sound Meter or Cairos IOT have ads?
Which is updated more often, Sound Meter or Cairos IOT?
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