Fastward Fastward
Pick a window. Watch your body shift gears.
A clean, private fasting timer that shows you the metabolic phases you move through — ketosis, autophagy, and more — as the clock runs.
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.
One-time purchase.
No subscription, ever.
Pay once and keep Fastward for life — no renewals, no creeping “premium” paywalls.
Get notified at launchPrivate & offline-first — your fasting data stays on your device.