See exactly what happens in your body during every hour of a fast — and break through the wall where most people stop.
Not just a timer. A living guide, built on science and 30 years of experience.
“You're at hour 34 — here's what your body is doing now.” Seven stages, from preparation to immune renewal.
The techniques that carry you past the 42–48h wall — the exact point where most people quit.
Contraindications and stop-signs. Fasting done responsibly, not recklessly.
Log how you feel, hour by hour. Track your progress from one fast to the next.
Ask anything about your fast. It answers from the book, in your language.
Condition-specific guidance: infections, respiratory, blood sugar, heart.
Start free. Move to a paid plan when you're ready for more.
9 € / mo
billed 108 €/yr · save 24 €
23 € / mo
billed 276 €/yr · save 48 €
67 € / mo
billed 804 €/yr · save 144 €