# Duct Sensor Assistant vs Expo ConneX

The clearest difference is update cadence: Expo ConneX at fortnightly against Duct Sensor Assistant's every 6 months. Expo ConneX also leads on iOS requirement (8.0 vs 12.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Duct Sensor Assistant ships an update every 6 months, Expo ConneX fortnightly. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Duct Sensor Assistant | Expo ConneX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Size | 31 MB | 84 MB |
| Requires iOS | 12.0 | **8.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BELIMO Automation AG](https://appshunter.io/developer/1149281298) | [Mediastudio Srl](https://appshunter.io/developer/428460126) |

## What reviewers say

### Duct Sensor Assistant

[App page](https://appshunter.io/ios/app/duct-sensor-assistant/id1559862597)

**Features:** macOS Compatibility

**In-app purchases:** none


### Expo ConneX

[App page](https://appshunter.io/ios/app/expo-connex/id1605944813)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Duct Sensor Assistant free?

Duct Sensor Assistant is free to download, with no in-app purchases.

### Is Expo ConneX free?

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

### Do Duct Sensor Assistant or Expo ConneX have ads?

Neither Duct Sensor Assistant nor Expo ConneX shows ads.

### Which is updated more often, Duct Sensor Assistant or Expo ConneX?

Duct Sensor Assistant ships an update every 6 months, and Expo ConneX fortnightly. Most recently, Duct Sensor Assistant was updated on October 6, 2026 and Expo ConneX on October 25, 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.*