Fastward Pick a window.
Watch your body shift gears.
Fastward is a clean, private fasting timer that shows you the metabolic phases you move through — ketosis, autophagy, and more — as the clock runs.
No spam — just one email the day we launch.
Everything you need to fast with intention
A timer, the science behind it, and a journal to keep — all in one private app.
A timer that counts every second
A real-time HH:MM:SS ring fills toward your target — 16h, 24h, 48h, or a custom window. Blow past your goal and it keeps counting, so you always know exactly where you stand.
Know exactly what your body is doing
As the clock runs, Fastward walks you from your first fed hours through glycogen tapping, the metabolic switch, ketosis, autophagy and deep restorative fasting — eleven phases in all, each with a plain-language explainer.
Notes & history that stick
Log coffee, water, or how you feel mid-fast — right from the live timer. Every fast is saved with stats, streaks, and your longest run, so you can see your progress over time.
No ads, ever
We sell an app, not your attention. No banners, no tracking, no noise.
Clean & simple
A calm, distraction-free interface built around one thing — your fast.
Private & offline-first
Works fully offline. Your data stays on your device unless you choose to sync.
One-time purchase.
No subscription, ever.
Pay once and keep Fastward for life — no renewals, no creeping “premium” paywalls.
Get notified at launch