App ·
Daluur ·
2024
Charge window
Drag across tomorrow's prices to pick when the car charges.
Company
Daluur
Role
Product designer
Team
A mobile engineer and the data engineer
Year
2024
Duration
Two months
Platform
iOS, Android
Context
Once customers could see tomorrow’s hourly prices, the next question was about the car. Charging takes hours, and the cheapest stretch moves every day.
My role
I designed the charging screen and built the first prototype in SwiftUI over a few evenings, picking up where the strip of hours in the app left off.
Solution
The screen shows tomorrow’s prices as a row of bars. Drag across them to choose when the car charges. The handles snap to whole hours and pull toward the cheapest stretch nearby, so a rough drag usually lands on a good window.
Once the window is set, the app starts and stops the charging on its own.
Tomorrow's prices, with the charging window over the cheapest hours.
The charging window, with handles that snap to whole hours.
Tomorrow's price inside the chosen window.
What I learned
Precision is the app’s job, not the customer’s. A drag only needs to be roughly right if the handles know where the good hours are.