# HVAC语音助手 vs Digital Clock

The clearest difference is review sentiment: Digital Clock at 100% against HVAC语音助手's 0%. Digital Clock also leads on update cadence (every 5 days vs every 12 months). HVAC语音助手's advantage is iOS requirement (9.0 vs 18.1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

HVAC语音助手 ships an update every 12 months, Digital Clock every 5 days. The most recent releases landed on October 6, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | HVAC语音助手 | Digital Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/digital-clock-led-retro/id6752945434/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 18 MB | 4 MB |
| Requires iOS | **9.0** | 18.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [荣锋 林](https://appshunter.io/developer/1042936800) | [SeungJun Lee](https://appshunter.io/developer/1435485286) |

## What reviewers say

### HVAC语音助手

[App page](https://appshunter.io/ios/app/hvac/id1459208239)

This utility app allows users to manage their smart home devices, including thermostats, by connecting them to the cloud and integrating with voice assistants. It facilitates voice control for managing home environments.

**Highlights:** Account registration and login, Manage home and room settings, Device management, Cloud synchronization for thermostats, Amazon Alexa voice control integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Digital Clock

[App page](https://appshunter.io/ios/app/digital-clock-led-retro/id6752945434)

Transform your device into a retro LED digital clock with a dot matrix design. Offers multiple time formats, vibrant color options, and a full-screen display. Ideal for bedside tables, desks, or any space needing an elegant timepiece.

**Highlights:** Authentic dot matrix design, Multiple time formats (12/24 hr, seconds on/off), 6 vibrant LED color options, Full-screen display, Optimized for all iPhones and iPads, Simple tap-to-access settings

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HVAC语音助手 free?

HVAC语音助手 is free to download, with no in-app purchases.

### Is Digital Clock free?

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

### Do HVAC语音助手 or Digital Clock have ads?

Neither HVAC语音助手 nor Digital Clock shows ads.

### Which is updated more often, HVAC语音助手 or Digital Clock?

HVAC语音助手 ships an update every 12 months, and Digital Clock every 5 days. Most recently, HVAC语音助手 was updated on October 6, 2026 and Digital Clock on October 19, 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.*