# Vent vs Calex Smart

The clearest difference is rating: Vent at 5.0 against Calex Smart's 4.3. Calex Smart's advantage is ratings volume (35 vs 1) and review sentiment (34% vs 20%). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Vent holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Calex Smart has 35 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 20% of Vent's written reviews are positive against 34% of Calex Smart's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Vent | Calex Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vent-axia-connect/id1077799767/reviews)** | [4.3 (35 ratings)](https://appshunter.io/ios/app/calex-smart/id1471978691/reviews) |
| Number of ratings | 1 | **35** |
| Positive reviews | 19.8% of reviews | **33.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 70 MB | 256 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Volution Group](https://appshunter.io/developer/1782103378) | [Electro Cirkel Retail B.V](https://appshunter.io/developer/1461044589) |

## What reviewers say

### Vent

[App page](https://appshunter.io/ios/app/vent-axia-connect/id1077799767)

Control and customize Vent-Axia ventilation fans like Svara®, Pure Air Sense®, and Svensa® via Bluetooth. Adjust settings, set schedules, monitor performance, and receive fault indications for optimal air quality.

**Highlights:** Bluetooth fan control, Customizable fan settings, Scheduling by weekday/weekend, Humidity and light sensor adjustment, Real-time air pressure monitoring, Fault indication and recovery

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

**In-app purchases:** none

**What reviewers like**

- 👍 Fan hardware works well
- 👍 Easier to program than old fans
- 👍 Works well with Kinetic Advance MHVR units
- 👍 App works fine for PureAir Sense
- 👍 Love this fan and App

**What reviewers complain about**

- 👎 App has fewer features than before
- 👎 Controller disconnects frequently
- 👎 Clunky UI, difficult to use
- 👎 App feels unfinished
- 👎 PIN code required repeatedly

**Reported bugs**

- Controller disconnects
- Boost function doesn't work
- PIN code required repeatedly
- Unit shows red light after power cut, requires Bluetooth reconnect
- App update forgot all devices, difficult to reconnect

**Requested features**

- Bring back missing features
- Improve stability and design of the app
- Add cloud backend for remote access
- Improve UI and polish
- Add dark mode option


### Calex Smart

[App page](https://appshunter.io/ios/app/calex-smart/id1471978691)

Control your smart lights and appliances with ease. Automate your devices using smart routines for seamless on/off control. Enjoy plug-and-play installation via WiFi without needing an extra hub.

**Highlights:** Control smart lights and appliances, Create smart routines, Plug and Play WiFi installation, No additional gateway needed

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Good value for money
- 👍 Intuitive and flexible app
- 💡 Lights work well
- 💡 Easy to use app
- 💡 Good control over brightness and hue

**What reviewers complain about**

- 🐛 Frequent connection issues
- 🐛 App crashes frequently
- 🐛 Difficult device pairing
- 🐛 Poor integration with Apple Home
- 🐛 Devices go offline randomly

**Reported bugs**

- App crashes when changing color
- App crashes on iPhone
- App keeps crashing or losing connection
- App loses connection for no reason
- Devices go offline and won't reconnect

**Requested features**

- Widget support for Home Screen
- Dark mode
- Better Apple HomeKit integration
- Create widgets for iPhone Home Screen
- Integrate with Apple Shortcuts for custom automation


## Frequently asked questions

### Is Vent free?

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

### Is Calex Smart free?

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

### Which has better reviews, Vent or Calex Smart?

Vent is rated higher. Vent averages 5.0 out of 5 from 1 ratings, while Calex Smart averages 4.3 from 35 ratings.

### Do Vent or Calex Smart have ads?

Neither Vent nor Calex Smart shows ads.

### Which is updated more often, Vent or Calex Smart?

Vent ships an update every 2 months, and Calex Smart every 2 months. Most recently, Vent was updated on October 24, 2026 and Calex Smart 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.*