Comparison

Ember vs Flair

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

Head to head
About

Ember

This app allows you to precisely control the temperature of your hot beverages using a smart mug. Customize presets, receive notifications when your drink reaches the perfect temperature, and explore recipes. Personalize your mug settings for an enhanced drinking experience.

Highlights
  • Precise temperature control
  • Save temperature presets
  • Beverage recipes and blogs
  • Customizable notifications
  • Manage multiple mugs
  • Personalize mug settings
Features
Read full description

At Ember®, we use temperature control to change the world in ordinary (and extraordinary) ways. With an Ember Temperature Control Smart Mug and the Ember app, you can transform your mornings by making hot beverages set to your chosen temperature an everyday reality. Our redesigned Ember app is simple, easy to use, and customizable. Whether you are a first-time user or a long-time customer, get ready for a whole new temperature control experience. The Ember app seamlessly pairs with your Ember products to precisely adjust your favorite hot drinks to your preferred drinking temperature, saves temperature presets, offers recipes, sends notifications when your desired drinking temperature has been reached, and more. Ember App Features: - Control the temperature of your beverage down to the degree - Use your previous temperature setting for a set-it-and-forget-it beverage experience - Manage unlimited paired mugs on an all-new Ember home screen - Find recipes and blogs you can save and share with friends and family in the new Explore section - Receive notifications when your preferred temperature has been reached, or your battery is low - Customize presets for multiple beverages and engage timers - Personalize your mugs with names and adjust the color of the smart LED - Easily switch between °C/°F and control sounds and haptic feedback in the redesigned Account section - Access Ember x Health with Apple Health

About

Flair

Control your home's heating and cooling room by room from your smartphone. Create custom schedules, save energy with geofencing, and integrate with smart home devices for ultimate comfort and efficiency.

Highlights
  • Room-by-room temperature control
  • Customizable schedules
  • Geofencing for energy saving
  • Smart home device integration
  • Remote access and control
  • Share access with family
Features
Read full description

Flair is Next Degree™ climate control for your home air conditioning and heating system. With the Flair app, you can enjoy room-by-room comfort anytime, anywhere by adjusting your temperature setpoints and creating schedules for individual rooms. Away from home? Our geofencing will make sure you save energy by automatically setting rooms as active or inactive as needed. You can use the Flair app to -Easily set up your Flair Puck and Smart Vents. You can also connect your Flair devices to your mini split, Nest, ecobee, Honeywell Lyric, and even your Alexa or Google Assistant devices. -Get room-by-room comfort. You can create schedules to make sure every room in your home is comfortable. -Save energy. Set up geofencing and Smart Away to make sure your rooms are exactly how you want them when you're out of the house. -Share home comfort. Set up account permissions for friends, family, or a house sitter. But don't worry: anyone can set a temperature directly from the Puck, even if they don't have the App. Have some thoughts? We always want to hear your feedback on our app. Send them our way: hello@flair.co

Screenshots

Ember4 screens
Flair4 screens

Verdict

The call

The clearest difference is ads: Ember at none against Flair's shown. Ember also leads on monetization model (free vs free with in-app purchases) and ratings volume (7.4K vs 125). Flair's advantage is review sentiment (42% vs 18%) and device support (3 vs 1). On price, rating, update cadence 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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.3 for Ember against 3.3 for Flair. That said, the two scores are not equally well evidenced: Ember has 7.4K ratings behind it against 125, so its average is the more settled of the two. Written reviews are what separate them: 18% of Ember's written reviews are positive against 42% of Flair's.

UpkeepUpdate frequency

Ember ships an update every 2 months, Flair every 6 weeks. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.

Scorecard5 real differences · 5 level
Ember versus Flair: the parameters behind the verdict, then further details
ParameterEmberFlair
PriceFreeFree
Rating3.3 (7.4K ratings)3.3 (125 ratings)
Positive reviews18.0% of reviews42.5% of reviews — better
Number of ratings7.4K — better125
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.615.1 — better
Further details — not scored
Size63 MB32 MB
Age rating4+4+
DeveloperEmber Technologies Inc.Standard Euler

Customer experience

Ember

All ratings7,424 ratings
Positive54.6%
Neutral4.8%
Negative40.6%
Written reviews1,289 reviews
Positive18.0%
Neutral8.3%
Negative73.7%

Flair

All ratings125 ratings
Positive51.2%
Neutral5.6%
Negative43.2%
Written reviews106 reviews
Positive42.5%
Neutral5.7%
Negative51.9%

User reviews

Ember

From 7.4K App Store ratings

What we love

  • ⭐ Keeps drink at perfect temperature
  • 🍵 Great for tea and coffee drinkers
  • 🎨 Customizable LED light colors
  • 🔋 Decent battery life when used properly
  • 🤖 Apple Watch app integration

Room to improve

  • 🔌 Requires frequent charging and docking
  • 🔒 Forced account creation and login
  • 🔄 Unreliable Bluetooth connectivity
  • 🐛 Buggy app with frequent issues
  • 🤔 Confusing app UI and controls

Flair

From 125 App Store ratings

What we love

  • ✅ Solves temperature imbalance issues effectively
  • 🔧 Easy hardware installation
  • 📱 Useful scheduling and geofencing features
  • 🏠 Seamless integration with Ecobee systems
  • 💰 Cost-effective alternative to zoned HVAC

Room to improve

  • 🐛 App is buggy and unreliable
  • 🐌 Slow app response times and updates
  • 😕 Poor user interface design
  • 🔌 Requires cloud connectivity for all functions
  • 🔐 Installer code restrictions limit user control

Bugs and requests

Ember

Reported bugs

5 issues
  • App frequently logs users out
  • Mug disconnects from app randomly
  • Firmware update process often fails
  • App doesn't always detect liquid in mug
  • Presets and settings get lost after updates

Requested features

5 requests
  • Battery level indicator on main screen
  • Improved Apple Watch app functionality
  • Wireless charging option
  • Ability to lock temperature settings
  • Automatic temperature adjustment based on volume

Flair

Reported bugs

21 issues
  • App loses API connection and requires reconfiguration
  • Thermostat puts out max heat despite room being above setpoint
  • Vents don't respond to app commands inconsistently
  • App splash screen overlay blocks interface in portrait mode
  • Back button unresponsive on iPhone 14/15
Show 16 more
  • Temperature settings revert to previous values
  • Vent stuck in manual mode and won't return to auto
  • App doesn't follow thermostat priority schedules
  • Motion sensors override schedule settings incorrectly
  • 5+ minute delay in temperature updates from sensors
  • Devices show offline despite active WiFi connection
  • App hangs on iPad initial load screen
  • Firmware updates delete system configuration
  • Geofencing fails to detect home/away status
  • System switches between heat and cool modes excessively
  • Hold function defaults to permanent with no obvious duration option
  • Temperature adjustment dial is oversensitive
  • Text selection appears when trying to adjust temperature
  • App doesn't communicate mode changes to pucks
  • Nest thermostat integration inconsistent
  • Historical vent open percentage data no longer visible

Requested features

17 requests
  • Dark mode for app interface
  • Dual setpoint control (separate heat/cool temperatures)
  • HomeKit integration
  • Local control without cloud dependency
  • Manual mode scheduling
Show 12 more
  • Ability to set vents to mixed automatic/manual states
  • Faster app refresh and response times
  • Visible vent open/close status in main view
  • Better integration with Nest thermostat
  • Puck temperature offset adjustment
  • Temperature range settings instead of single setpoint
  • Matter protocol support
  • Zigbee or Z-Wave compatibility
  • Occupancy sensor integration from other platforms
  • Mode switching delay to prevent heat/cool cycling
  • Default vent state when HVAC is off
  • Improved schedule UI and temperature adjustment controls

In-app purchases

None

Ember

No in-app purchases

None

Flair

No in-app purchases

Questions

Is Ember free?
Ember is free to download, with no in-app purchases.
Is Flair free?
Flair is free to download, with no in-app purchases.
Which has better reviews, Ember or Flair?
Ember and Flair are both rated 3.3 out of 5 on the App Store, from 7.4K and 125 ratings respectively.
Do Ember or Flair have ads?
Flair shows ads; Ember does not.
Which is updated more often, Ember or Flair?
Ember ships an update every 2 months, and Flair every 6 weeks. Most recently, Ember was updated on September 23, 2026 and Flair on September 19, 2026.

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