TwinSelf reads your state — sleep, variability, rhythm, mood — and answers the only question that matters when you open the app: what do I do now? One sentence about how you are. One clear recommendation. The numbers stay available if you want them — never imposed.
The whole screen collapses into three zones: your body's state in one sentence, a recommendation with the why, and the signals that justify it — discreet, expandable. Nothing more.
Train the long one today. Up to Z3, no rush.
Because you slept 7h40 at 92% efficiency, HRV 14% above your average, and you haven't gone past Z2 in four days.
The screen doesn't change structure — it changes tone. A recovered morning is warm and direct. An afternoon of meetings is cool and short. Night is intimate. A rest day gives permission.
Train the long one today. Z2 with short Z3 stretches.
Because HRV is 14% above average, 7h40 of sleep, and 4 days without intensity.
Step out for a 10-minute walk. No headphones.
Because your variability dropped 22% since 11am and you haven't left the chair in 2h40.
Close the screen now. Sleep before 11:30pm gives the morning back.
Because you had dinner at 8:15pm and cortisol is already dropping — good window for deep sleep in the next 40 min.
Don't train today. Light walk or nothing.
Because acute load rose 38% this week and HRV only opened 4ms. The gain lives in rest now.