# Cielo PRO vs DecibelLab

The clearest difference is in-app purchases: Cielo PRO at none against DecibelLab's 2. Cielo PRO also leads on iOS requirement (16.0 vs 18.0). DecibelLab's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. DecibelLab sells 2 in-app purchases, starting at $14.99 per year. Cielo PRO asks for nothing beyond the download.

Cielo PRO ships an update every 3 weeks, DecibelLab every 2 days. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cielo PRO | DecibelLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cielo-pro/id6757784458/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 28 MB | 15 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cielo WiGle Inc.](https://appshunter.io/developer/1030282554) | [永芳 徐](https://appshunter.io/developer/1887200583) |

## What reviewers say

### Cielo PRO

[App page](https://appshunter.io/ios/app/cielo-pro/id6757784458)

This tool empowers HVAC professionals to efficiently install smart thermostats, manage customer relationships, and enhance their business branding. It offers guided workflows, Bluetooth configuration, and AI-powered templates for quick and reliable setups.

**Highlights:** Free Pro Branding, Guided Thermostat Installation Workflow, Bluetooth-Based Configuration, AI-Powered HVAC Configuration Templates, Save Thermostat Configurations, HVAC Equipment Testing, Instant Thermostat Handoff, Customer & Workforce Management

**In-app purchases:** none


### DecibelLab

[App page](https://appshunter.io/ios/app/decibellab-sound-level-meter/id6761004946)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Annual | $14.99 | per year |
| PRO 终身版 | $19.99 | one-time |


## Frequently asked questions

### Is Cielo PRO free?

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

### Is DecibelLab free?

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

### Do Cielo PRO or DecibelLab have ads?

Neither Cielo PRO nor DecibelLab shows ads.

### Which is updated more often, Cielo PRO or DecibelLab?

Cielo PRO ships an update every 3 weeks, and DecibelLab every 2 days. Most recently, Cielo PRO was updated on October 10, 2026 and DecibelLab on October 24, 2026.

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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.*