# Fermax DuoxMe vs YOUNGDO

The clearest difference is rating: Fermax DuoxMe at 4.6 against YOUNGDO's 2.5. Fermax DuoxMe also leads on review sentiment (55% vs 20%) and ratings volume (263 vs 24). YOUNGDO's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fermax DuoxMe sells 2 in-app purchases, starting at $2.00 per month. YOUNGDO asks for nothing beyond the download.

Fermax DuoxMe holds the better App Store score, 4.6 against 2.5. That said, the two scores are not equally well evidenced: Fermax DuoxMe has 263 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 55% of Fermax DuoxMe's written reviews are positive against 20% of YOUNGDO's.

Fermax DuoxMe ships an update monthly, YOUNGDO every 3 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Fermax DuoxMe | YOUNGDO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (263 ratings)](https://appshunter.io/ios/app/fermax-duoxme/id1442204916/reviews)** | [2.5 (24 ratings)](https://appshunter.io/ios/app/youngdo/id1467866412/reviews) |
| Number of ratings | **263** | 24 |
| Positive reviews | **55.1% of reviews** | 20.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 150 MB | 21 MB |
| Requires iOS | 18.0 | **9.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Fermax](https://appshunter.io/developer/891332024) | [师松 梁](https://appshunter.io/developer/922518056) |

## What reviewers say

### Fermax DuoxMe

[App page](https://appshunter.io/ios/app/fermax-duoxme/id1442204916)

Control your Fermax video door entry system remotely. Answer calls, open doors, and check visitors from anywhere in the world. Share digital keys securely with family and friends, simplifying access to your home.

**Highlights:** Answer video door calls remotely, Open doors instantly, Check visitor history, Share digital keys, Connect via Wi-Fi monitor or Fermax CONNECT

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Monthly | $2.00 | per month |
| Unlimited annual | $17.00 | per year |


### YOUNGDO

[App page](https://appshunter.io/ios/app/youngdo/id1467866412)

This app utilizes ultrasonic vibrations to create a fine, cool mist from water and essential oils. It aims to enhance your environment by promoting relaxation and a sense of well-being. The device is designed to complement home and office decor.

**Highlights:** Ultrasonic vibration technology, Creates nanometer cold fog, Dissolves essential oils, Enhances home and office ambiance, Promotes relaxation and well-being

**In-app purchases:** none


## Frequently asked questions

### Is Fermax DuoxMe free?

Fermax DuoxMe is free to download, with in-app purchases available.

### Is YOUNGDO free?

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

### Which has better reviews, Fermax DuoxMe or YOUNGDO?

Fermax DuoxMe is rated higher. Fermax DuoxMe averages 4.6 out of 5 from 263 ratings, while YOUNGDO averages 2.5 from 24 ratings.

### Do Fermax DuoxMe or YOUNGDO have ads?

Neither Fermax DuoxMe nor YOUNGDO shows ads.

### Which is updated more often, Fermax DuoxMe or YOUNGDO?

Fermax DuoxMe ships an update monthly, and YOUNGDO every 3 weeks. Most recently, Fermax DuoxMe was updated on October 24, 2026 and YOUNGDO on October 20, 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.*