Thermoast:
High-End Innovation
Thermoast:
High-End Innovation
One system for premium home climate—redesigned thermostat
+ app with clearer schedules, smarter interactions,
and sleep-aware comfort.
One system for premium home climate—redesigned thermostat
+ app with clearer schedules, smarter interactions,
and sleep-aware comfort.
Prototype
Prototype
Design system
Design system
Output
Output
Role
Role
Lead UX
Lead UX
Designer
Designer
Product Design
Product Design
UI/UX
UI/UX
Interaction Innovation
OverFlow
We redesigned Thermoast into a consistent scheduling experience that users can act on instantly.
Through 9 iterations, we transformed insights into
40+ design assets and improved user confidence end-to-end. The final prototype scored 7+ satisfaction and strengthened the business path for retention and premium growth.
As Design Lead, I drove the schedule overhaul and built the innovation modules end-to-end. I aligned direction with a design partner through critique loops, and partnered with PMs to turn requirements into crisp, user-centric decisions.
25% of them choose Google Nest.
Google Nest With four generations
since 2011 and ~15M U.S. households,
14% of U.S. households use a smart
thermostat today.
Target Audience they want to seek:
Aesthetics
&Simplicity
Comfortable
& Quality
Clear Temperature System
Reliable Performance
Tactile Clarity
Focus on health
Simple UI
Visual Clarity
Modern, Elegant Design
Streamlined Flow
Minimal Steps
40% - 70%
Users skip scheduling interfaces because they’re cumbersome.
In a U.S. survey of 2,000 adults,
31% said being too hot or cold disrupts sleep
—explaining why people may keep adjusting the thermostat
at night yet still not know what helped.
The Problem
Tiny drag controls
Landscape-only workflow
Editing controls are far
Confusing time scale
Confusing temperature set points
No global timeline
No immediate weekly review
Painpoints –
App & Thermostat
Sleep apps only provide sleep data
Thermoast unifies sleep stages and temperature in a single timeline, highlighting a personal comfort range for the next night.
Opportunity
Thermostats only provide temperature control
Goal
From Outdated Visuals
→ To Modern Clarity
From Fragmented Touchpoints
→ To Unified Experience
From Complex Controls
→ To Effortless Actions
From Sleep Guesswork
→ To Sleep-Aware Comfort
Complex and unclear interaction flow
Outdated visual style
Visual hierarchy cluttered
For sleep & Temperature
Strategic Fit: Why Google / Why now
For the full project, please visit:
https://www.figma.com/design/vphSohyhK2ntiOiaiGvrRQ/%E4%BD%9C%E5%93%81%E9%9B%86%E9%A1%B9%E7%9B%AE%E4%B8%80?node-id=0-1&t=VKufScKwBrDgtLh3-1
See more detail:
Iterated refinement drove
Task efficiency
Product innovation
Visual system coherence
—extending product longevity.
Next step:
Larger test sample / Long-term sleep data / Privacy and permissions challenge
Refining and improving the thermostat
through 9 design versions
Applying Insights Through Iteration
Change temperature easily
And easy to back and edit
Effortless Temperature Tuning
For sleep & Temperature
Thermoast:
High-End Innovation
One system for premium home climate—redesigned thermostat + app with clearer schedules, smarter interactions, and sleep-aware comfort.
Product Design
UI/UX
Prototyping
Thermoast:
High-End Innovation
One system for premium home climate—redesigned thermostat + app with clearer schedules, smarter interactions, and sleep-aware comfort.
Product Design
UI/UX
Prototyping