# D vs VIO

The clearest difference is update cadence: D at weekly against VIO's every 13 months. 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.

D ships an update weekly, VIO every 13 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | D | VIO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/d-controls-smarthome/id1422753588/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 13 months |
| Monetization | Free | — |
| Size | 82 MB | 181 MB |
| Requires iOS | 12.4 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou D-Haus Technology Co.,Ltd.](https://appshunter.io/developer/540292612) | [Guangdong VIO Technology Co.,Ltd](https://appshunter.io/developer/1773754380) |

## What reviewers say

### D

[App page](https://appshunter.io/ios/app/d-controls-smarthome/id1422753588)

Control lights, air conditioning, ventilation, and more remotely via KNX hardware. Manage an entire building's systems with intuitive touch controls on a floor plan.

**Highlights:** Remote lighting control, Air conditioning management, Ventilation system control, Floor plan interface, Building system management, Security system integration

**Features:** macOS Compatibility

**In-app purchases:** none


### VIO

[App page](https://appshunter.io/ios/app/vio/id6449248590)

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

**In-app purchases:** none


## Frequently asked questions

### Is D free?

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

### Is VIO free?

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

### Do D or VIO have ads?

Neither D nor VIO shows ads.

### Which is updated more often, D or VIO?

D ships an update weekly, and VIO every 13 months. Most recently, D was updated on November 2, 2026 and VIO on November 3, 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.*