Interval
12 屏 · 健身与训练Training measured in zones, not in minutes
Twelve screens of an interval training app built on the one measurement that makes a hard session honest, which heart rate zone the work actually happened in, with every zone boundary, time in zone, session load and weekly total on every screen derived from a maximum and a threshold rather than asserted beside the timer.
设计系统加上全部 12 屏，一条提示词全带走。如果只要其中一屏，每一屏也都有自己的免费页面。
设计系统
随套装附带的一个文件。每一屏都把这些数值写在自己里面，好让它能被单独取走；构建会拒绝任何画出这个文件未命名颜色的屏幕。
颜色
尺度
流程
按人们遇到它们的先后排列。这是应用自身的顺序，不是一份分类清单。
Planning the work
4Deciding what today is for. A week that balances hard against easy, a session written as rounds rather than prose, and the editor that shapes it.
Doing it
4The four screens that exist for someone out of breath. Large figures, one decision at a time, and the zone ring that says whether the effort is landing where it was meant to.
Seeing it add up
4What a month of this actually did. Sessions behind you, the trend they make, the watch strapped to your wrist, and the account holding it together.
