AIRSTAGE Mobile vs Navien Multikit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AIRSTAGE Mobile
Control your Fujitsu General air conditioners remotely using your mobile device. Adjust settings like temperature, fan speed, and operation mode. Schedule weekly timers and receive notifications for errors.
- Remote ON/OFF control
- Adjust operation mode and temperature
- Set fan speed and airflow direction
- Weekly timer scheduling
- View operation status
- Error display and history
- Push notifications
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“AIRSTAGE Mobile” is an application software that enables you to operate the General’s air conditioner(s) with a mobile device. *For more information, please refer to the following website. https://www.general.com/global/airstage-mobile/index.html ＜Main Features of AIRSTAGE Mobile＞ ・Control - Operation ON / OFF - Operation Mode - Setting Temp. - Fan Speed - Airflow Direction ・Operation status ・Schedule - Weekly Timer 2 sets of the weekly timer can be made available, which is convenient for summer and winter respectively. Up to 4 individual setting of the time can be set on a day. The schedule timer can be made available according to your lifestyle. ・Others - Error Display & Error History - Push Notification Up to 50 air conditioners can be registered. All air conditioners in your home can be operated by a single mobile device. It can also be operated on several owned residential properties. Two connection modes are selectable. Cloud control：Mode of operation via the Internet. Direct control：Mode of operation without Internet *Some functions are restricted in Direct control. In order to use the application software, you are required to prepare the following items of the General’s air conditioner(s) which supports the wireless LAN network connection and the 24/7 broadband Internet access as well as a wireless LAN router. *A wireless LAN router is required only for Cloud control.
Navien Multikit
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■ Accurate diagnosis based on live data - Monitoring: Easily check each sensor’s data on the boiler ■ Customised settings according to each user’s needs and property type - Download the optimal firmware for each user [Right to access required] •Location - Bluetooth scan (Wi-Fi, Bluetooth) •Use of storage space - Use of storage space for downloading F/W Contact : support@kdiwin.com
Screenshots
Verdict
The clearest difference is update cadence: AIRSTAGE Mobile at every 2 months against Navien Multikit's every 8 months. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
AIRSTAGE Mobile ships an update every 2 months, Navien Multikit every 8 months. Both last shipped on November 3, 2026.
| Parameter | AIRSTAGE Mobile | Navien Multikit |
|---|---|---|
| Price | Free | Free |
| Rating | 2.1 (53 ratings) — better | — |
| Positive reviews | 25.7% of reviews | — |
| Number of ratings | 53 — better | — |
| Update frequency | Every 2 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 74 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | GENERAL Inc. | KD Navien |
Bugs and requests
AIRSTAGE Mobile
Reported bugs
66 issues- Error: 5321
- Communication errors
- Cannot log out
- Auto mode temperature control issues
- App shows incorrect unit status (color)
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- Cannot connect to system
- Device falls off WiFi network
- No mention of how to restore functionality in FAQ
- No response from customer support
- Requires Wi-Fi for AC unit functionality
- Requires logging in every time
- No internet connection error despite having internet
- Air handle unit does not display current room temperature
- Cannot set heat and cool settings independently
- Wasted money on wireless LAN adapter for independent settings
- App is rubbish, works one minute and not the next
- Doesn't recognize login passwords
- Locks users out
- Unusable after update, no options available
- Unit exists in app but cannot do anything
- Latest update (April 2025) is awful
- Phone has no internet connection error
- Required to sign in multiple times
- LN function does not display on controllers
- No instructions for LN function issues
- Frequent disconnections from cloud server
- Cloud server communication errors
- App refuses to function if VPN is active
- Errors make app and hardware unusable
- Cannot connect to WiFi anymore
- Impossible to connect to app if using VPN
- Weekly timer setup doesn't work
- Losing connection all the time
- Unit keeps going offline, requires reloading app
- Constant offline issue on iPhone
- Regularly have to reconnect with Alexa
- App is full of bugs
- Cannot switch between operation modes (heat, AC, dry, etc.)
- Screen appears blank when trying to select modes
- Have to keep re-linking app to Alexa
- Firmware update manual keeps failing
- Schedule update option is missing
- Screenshots do not match the application
- Won't let me create an account, 'an unknown error occurred'
- App has stopped working, only works in direct mode
- Cannot create an account, error messages received
- Unit doesn't have QR code or SSID for pairing
- Cannot schedule fan speed
- Fan doesn't turn off after schedule
- App panics and quits after tapping start registration
- Cannot register multiple users
- Won't connect if using a VPN, incorrect error message
- Cannot get app to connect to unit
- Lacks humidity display
- Lacks filter replacement reminders
- Lacks ability to view run time in each mode
- App has ceased functioning, cannot log in or change password
- Login buttons do not function
- App crashes at the last step when registering the indoor unit
- App crashes instantly when registering an air con unit
- Unit names are serial numbers and cannot be changed
- Erratic function, stopped working with Alexa
- App is corrupted
- App works fine but not as supported as FGLair
- Cannot get Google Home and Alexa to work
- App is not made for iPad
Requested features
16 requests- Integrate in HomeKit or Shortcuts
- Add Sleep Timer function for AC
- Allow separate heat and cool settings
- Update app for separate heat/cool settings
- Allow users to schedule fan speeds
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- Display installing location of units
- Integrations with HomeKit, Home Assistant, Alexa
- Support for UTY-TFNXZ2 wan adapters
- Provide input on app improvements
- Allow multiple users to register devices
- Add humidity display
- Add filter replacement reminders
- View run time in each mode
- Contextual help
- Allow scheduling of updates
- Support for iPad
Navien Multikit
Not enough reviews yet to summarise bugs or requests.
In-app purchases
AIRSTAGE Mobile
No in-app purchases
Navien Multikit
No in-app purchases
Questions
Is AIRSTAGE Mobile free?
Is Navien Multikit free?
Do AIRSTAGE Mobile or Navien Multikit have ads?
Which is updated more often, AIRSTAGE Mobile or Navien Multikit?
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