Comparison

Utopis vs Calex Smart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Creators of Ambiance

★ 4.335 ratingsView app →

About

Utopis

Features

Read full description

Deze app toont de mogelijkheden van het Utopis platform. Het presenteert de data en product- project- en systeemselectoren van onder andere forbo eurocol en v.d. Bosch Beton.

About

Calex Smart

Control your smart lights and appliances with ease. Automate your devices using smart routines for seamless on/off control. Enjoy plug-and-play installation via WiFi without needing an extra hub.

Highlights

Control smart lights and appliances
Create smart routines
Plug and Play WiFi installation
No additional gateway needed

Features

Read full description

1. Easily control your smart lights and appliances via the Calex Smart app 2. Use smart routines to switch lights and appliances on and off 3. Plug and Play installation based on WiFi 4. You do not need an additional gateway/Hub

Screenshots

Utopis1 screens

Calex Smart4 screens

Verdict

The call

The clearest difference is update cadence: Calex Smart at every 2 months against Utopis's every 5 months. Calex Smart also leads on device support (4 vs 2) and iOS requirement (14.0 vs 16.0). On price, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Utopis ships an update every 5 months, Calex Smart every 2 months. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 7 level

Utopis versus Calex Smart: the parameters behind the verdict, then further details
Parameter	Utopis	Calex Smart
Price	Free	Free
Rating	—	4.3 (35 ratings) — better
Positive reviews	—	33.6% of reviews
Number of ratings	—	35 — better
Update frequency	Every 5 months	Every 2 months — better
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPad	iPhone, iPad, iPod, Apple Watch — better
Requires iOS	16.0	14.0 — better
Further details — not scored
Size	6 MB	256 MB
Age rating	4+	4+
Developer	ZeeBoer b.v.	Electro Cirkel Retail B.V

Bugs and requests

Utopis

Not enough reviews yet to summarise bugs or requests.

Calex Smart

Reported bugs

52 issues

App crashes when changing color
App crashes on iPhone
App keeps crashing or losing connection
App loses connection for no reason
Devices go offline and won't reconnect

Show 47 more

App duplicates automation routines on edit
Light stops responding, app stops responding
Smart plug flashing blue and won't reset
Bulb in disco mode, app refuses to pair
Lights start flashing sometimes
App can't find devices
Scheduled automations don't happen
Verification code not sent
Popup about bad signal obstructs settings
Timer function randomly closes app
App no longer allows music sync for lights
App gives non-stop reviews
Bluetooth connection issues, app hardly recognizes bulbs
App forgets bulbs after going to home page
Cannot change warmth of light, stuck on cool white
Bulb appears offline when away from home
App refuses to pair
Unskippable ad to turn off light
Advertisements every time app is opened
Device doesn't connect sometimes
Randomly loses connection and lamp flashes
App crashes
Account cannot be verified or network error
Cannot reset password, account doesn't exist
Devices keep dropping out and need re-adding
Bulb goes offline and needs resetting
Siri integration doesn't work, custom keyword reverts
Annoying dialog after executing a task
Bulb keeps going offline and flashing
Getting alerts outside of scheduled times
Pairing process is terrible for multiple devices
Cannot pair all bulbs on a single switch
App keeps losing connection with the watch
Apple Watch integration is poor
Randomly woken up by light turning on/flickering
App doesn't realize bulb isn't responding
Bulb doesn't respond to commands
Update made lights unusable, cannot connect
Disconnects randomly
LEDs started flashing and couldn't be turned off
Have to sign back into room every time
Half of LED strip fell off
Doesn't change colors, only dims
Cannot link lamp
No option to use as Bluetooth bulb
App requests location services to add devices
Old version of Apple widgets used

Requested features

22 requests

Widget support for Home Screen
Dark mode
Better Apple HomeKit integration
Create widgets for iPhone Home Screen
Integrate with Apple Shortcuts for custom automation

Show 17 more

Add colour changing cycle to a scene
Link items together to sync
Proper control of colour cycling timings
Sync multiple lights
Add colour cycle to a scene
Camera mode to sync lights with TV colors
Dusk-dawn switching that follows sunset/sunrise
Lock Screen widget for quick control
Ability to turn all devices in a room on/off with one touch
Scenes for entire rooms or home
Fade up and fade down options
Chain tasks together (e.g., 'turn off all lights')
Define sets of colors for tasks
Preview of color when setting up a task
Use alternating color for configuration instead of strobing flash
Add multiple devices at once connecting to the same WLAN
Fade up and fade down instead of just on and off

In-app purchases

None

Utopis

No in-app purchases

None

Calex Smart

No in-app purchases

Questions

Is Utopis free?

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

Is Calex Smart free?

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

Do Utopis or Calex Smart have ads?

Neither Utopis nor Calex Smart shows ads.

Which is updated more often, Utopis or Calex Smart?

Utopis ships an update every 5 months, and Calex Smart every 2 months. Most recently, Utopis was updated on October 9, 2026 and Calex Smart on October 13, 2026.