# AirCompare™ vs decibella 2

The clearest difference is ads: AirCompare™ at none against decibella 2's shown. decibella 2's advantage is update cadence (every 2 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

AirCompare™ ships an update every 3 months, decibella 2 every 2 weeks. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | AirCompare™ | decibella 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/aircompare/id1265636598/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 7 MB | 53 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Wayne Henderson](https://appshunter.io/developer/1265636597) | [Jisu Jung](https://appshunter.io/developer/1731788096) |

## What reviewers say

### AirCompare™

[App page](https://appshunter.io/ios/app/aircompare/id1265636598)

Optimize home energy usage and save money with smart ventilation and thermostat control. This app analyzes indoor and outdoor air quality, local weather, and electricity rates to automatically adjust your HomeKit-enabled devices for optimal comfort and cost savings.

**Highlights:** Ventilation controller, Thermostat controller, Automatic HomeKit device control, Energy consumption reduction, Weather and electricity rate analysis, Customizable rain sensitivity

**Features:** macOS Compatibility

**In-app purchases:** none


### decibella 2

[App page](https://appshunter.io/ios/app/decibella-2/id6768519741)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AirCompare™ free?

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

### Is decibella 2 free?

decibella 2 is free to download, with no in-app purchases.

### Do AirCompare™ or decibella 2 have ads?

decibella 2 shows ads; AirCompare™ does not.

### Which is updated more often, AirCompare™ or decibella 2?

AirCompare™ ships an update every 3 months, and decibella 2 every 2 weeks. Most recently, AirCompare™ was updated on October 7, 2026 and decibella 2 on October 4, 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.*