Fermax DuoxMe vs Simon iO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fermax DuoxMe
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.
- Answer video door calls remotely
- Open doors instantly
- Check visitor history
- Share digital keys
- Connect via Wi-Fi monitor or Fermax CONNECT
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Manage your Fermax video door entry system from your smartphone with DuoxMe. If your home is equipped with a Wi-Fi monitor or your building uses Fermax CONNECT technology, DuoxMe transforms your video door entry experience. Discover how this app can make your life easier: Answer your video door calls from anywhere: No matter if you are at home or on the other side of the world, you will always be connected. Open the door instantly: Access your home or building with a single touch, quickly and securely. Check who's rung your bell: Stay informed about visitors you receive, even when you're not at home. Share digital keys with your loved people: Forget about physical copies and give access to your family or friends with a complete peace of mind. Download DuoxMe and simplify your daily life with total control of your home from your mobile. See DuoxMe Terms and Conditions.
Simon iO
Control your smart home devices, including lights and blinds, from anywhere. Receive notifications, schedule routines, and customize device functionalities like lighting levels and power control. This app enhances your iO universe with a world of possibilities.
- Configure iO devices and experiences
- Control lights and blinds
- Receive notifications
- Schedule routines
- Adjust lighting levels
- Power control for devices
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* [IMPORTANT] This application is only compatible with the new HUB PRO iO (installations from 2020) The Simon iO app allows you to easily configure this entire new iO universe: from the iO devices, to the desired experiences. Experiences that you can change as many times as you want, since the process is really simple. Control lights, blinds and weather from inside and outside the home, receive notifications and schedule schedules will also be possible from the Simon iO app. Increasing the functionalities of your iO devices such as soft lighting of lights, regulation levels, beacons, power off delay and power control will also be possible. In short, a world of possibilities that are now at your fingertips. For further information please contact with: sat@simon.es
Screenshots
Verdict
The clearest difference is rating: Fermax DuoxMe at 4.6 against Simon iO's 1.0. Fermax DuoxMe also leads on ads (none vs shown) and review sentiment (55% vs 29%). Simon iO's advantage is in-app purchases (none vs 2) and iOS requirement (14.0 vs 18.0). On price, monetization model and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Fermax DuoxMe sells 2 in-app purchases, starting at $2.00 per month. Simon iO asks for nothing beyond the download.
Fermax DuoxMe holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Fermax DuoxMe has 263 ratings behind it against 2, 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 29% of Simon iO's.
Fermax DuoxMe ships an update monthly, Simon iO every 3 months. Both last shipped on October 24, 2026.
| Parameter | Fermax DuoxMe | Simon iO |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (263 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 55.1% of reviews — better | 28.6% of reviews |
| Number of ratings | 263 — better | 2 |
| Update frequency | Monthly — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 150 MB | 91 MB |
| Age rating | 4+ | 4+ |
| Developer | Fermax | Simon |
Customer experience
Fermax DuoxMe
Simon iO
In-app purchases
Fermax DuoxMe
- Unlimited Monthly$2.001 Month
- Unlimited annual$17.001 Year
Simon iO
No in-app purchases
Questions
Is Fermax DuoxMe free?
Is Simon iO free?
Which has better reviews, Fermax DuoxMe or Simon iO?
Do Fermax DuoxMe or Simon iO have ads?
Which is updated more often, Fermax DuoxMe or Simon iO?
Other comparisons
