# KoolCode vs Decibel

The clearest difference is rating: KoolCode at 5.0 against Decibel's 4.2. KoolCode also leads on in-app purchases (none vs 6). Decibel's advantage is ratings volume (413 vs 1) and iOS requirement (12.1 vs 15.1). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Decibel sells 6 in-app purchases, starting at $3.99 per 7 days. KoolCode asks for nothing beyond the download.

KoolCode holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Decibel has 413 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of KoolCode's written reviews are positive against 46% of Decibel's.

## The numbers

| Metric | KoolCode | Decibel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/koolcode/id563222728/reviews)** | [4.2 (413 ratings)](https://appshunter.io/ios/app/decibel-sound-level-meter/id1587049294/reviews) |
| Number of ratings | 1 | **413** |
| Positive reviews | **50.0% of reviews** | 45.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | — |
| Monetization | **Free** | Subscription |
| Size | 31 MB | 36 MB |
| Requires iOS | 15.1 | **12.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Paula Jeff](https://appshunter.io/developer/1587049536) |

## What reviewers say

### KoolCode

[App page](https://appshunter.io/ios/app/koolcode/id563222728)

This utility app provides quick, offline access to alarm and parameter codes for refrigeration controllers. It helps service technicians and engineers easily look up information without needing manuals or laptops.

**Highlights:** On-the-spot ADAP-KOOL controller information, Alarm status and parameter descriptions, Offline code lookup tool, Quick code translation, Hierarchical controller selection

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Decibel

[App page](https://appshunter.io/ios/app/decibel-sound-level-meter/id1587049294)

Measure and analyze the sound pressure around you. Compare your recordings to a reference chart to understand noise levels, from normal conversations to rocket launches. Unlock advanced features like audio recording saving and active screen history with a subscription.

**Highlights:** Measure sound pressure, Compare to reference chart, Analyze noise levels, Save audio recordings, Active screen history

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| dB: decibel sound level meter | $3.99 | per 7 days |
| Decibel - Sound Level Meter + | $3.99 | per 7 days |
| Decibel meter PRO | $9.99 | per 7 days |
| Decibel level meter | $9.99 | per 7 days |
| 3 moths Subscription | $29.99 | per 3 months |
| Decibel - Sound Level Meter | $29.99 | per year |

**What reviewers like**

- 👍 Easy to use and intuitive interface
- 🎯 Accurate and reproducible readings
- 📱 Convenient pocket-sized sound meter
- ⚡ Fast and instant measurements
- 🎨 Clear visual display

**What reviewers complain about**

- 💰 Extremely expensive subscription model ($30-$40/month or $5-$10/week)
- 😤 Deceptive free-to-download marketing strategy
- 🚫 Completely unusable without paid subscription
- ⚠️ Misleading App Store listing as free
- 🎣 Aggressive upsell tactics and review fishing

**Reported bugs**

- App doesn't work on some iPhone models
- Pushy notification system for upselling

**Requested features**

- Functional free version with basic features
- Free trial period before requiring subscription
- More transparent pricing disclosure in App Store listing
- Comparison with professional audio equipment accuracy


## Frequently asked questions

### Is KoolCode free?

KoolCode is free to download, with no in-app purchases.

### Is Decibel free?

Decibel is free to download, with in-app purchases available.

### Which has better reviews, KoolCode or Decibel?

KoolCode is rated higher. KoolCode averages 5.0 out of 5 from 1 ratings, while Decibel averages 4.2 from 413 ratings.

### Do KoolCode or Decibel have ads?

Neither KoolCode nor Decibel shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*