# Unical Ufly vs HygieneKey

The clearest difference is review sentiment: HygieneKey at 50% against Unical Ufly's 11%. HygieneKey also leads on update cadence (every 2 months vs every 18 months) and iOS requirement (8.0 vs 15.0). 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.

Unical Ufly ships an update every 18 months, HygieneKey every 2 months. The most recent releases landed on June 4, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Unical Ufly | HygieneKey |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 11.1% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 10 MB | 59 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DigiBrain](https://appshunter.io/developer/1124086004) | [春华 赖](https://appshunter.io/developer/1604536904) |

## What reviewers say

### Unical Ufly

[App page](https://appshunter.io/ios/app/unical-ufly/id1124086005)

Control your Unical heating system remotely via smartphone or tablet. Program daily and weekly schedules for heating and hot water, monitor boiler status, and receive push notifications for system errors. Supports multiple profiles for different homes.

**Highlights:** Remote heating system control, Daily and weekly programming, Domestic hot water scheduling, Boiler status monitoring, Solar system control, Error history and system reset, Push notifications for system issues

**Features:** macOS Compatibility

**In-app purchases:** none


### HygieneKey

[App page](https://appshunter.io/ios/app/hygienekey/id1178896230)

Control smart devices integrated with a special chip through your mobile. Easily program machines, manage schedules, monitor battery, and set refill life. Save and import device settings as profiles for quick setup.

**Highlights:** Profile setting and import, Battery status indication, Refill life setting and status, Working schedule setting, Normal/Peak time options, Device reset and service span setting, Password support

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

**In-app purchases:** none


## Frequently asked questions

### Is Unical Ufly free?

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

### Is HygieneKey free?

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

### Do Unical Ufly or HygieneKey have ads?

Neither Unical Ufly nor HygieneKey shows ads.

### Which is updated more often, Unical Ufly or HygieneKey?

Unical Ufly ships an update every 18 months, and HygieneKey every 2 months. Most recently, Unical Ufly was updated on June 4, 2026 and HygieneKey on September 8, 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.*