FastSloth: Fasting Tracker

No account. No subscription. No data leaves your phone.

FastSloth is the private intermittent fasting tracker with real-time ketosis and autophagy stages, hydration logging, and Home Screen widgets. Start in one tap.

FASTING MADE SIMPLE Start your fast with a single tap. Choose from popular protocols — 16:8, 14:10, 18:6, 20:4, OMAD — or create a custom schedule that fits your life. Real-time fasting stage indicators show you exactly when your body enters fat burning, ketosis, and deep autophagy.

HYDRATION TRACKING Staying hydrated is essential during a fast. Log your water intake with a quick tap and get gentle reminders throughout the day. Track your daily hydration progress at a glance — right from your Home Screen with our water tracking widget.

WEIGHT TRACKING & INSIGHTS Log your weight over time and see how your fasting routine is working. Visual progress charts help you spot trends, stay motivated, and make informed adjustments to your schedule.

SMART NOTIFICATIONS

• Fasting window start and end alerts
• Fasting stage notifications — know when you enter ketosis
• Water intake reminders throughout the day

STREAKS & MILESTONES Build consistency with streak tracking and milestone badges. Every completed fast counts — watch your streak grow.

HOME SCREEN WIDGETS Glance at your current fast, hydration progress, or streak right from your Home Screen. No need to open the app to stay informed.

BEAUTIFULLY PRIVATE No account required. No third-party tracking. All fasting data, weight, and hydration logs stay on your device. Open the app and start — it's that simple. Dark mode included.

FASTING PROTOCOLS INCLUDED

• 16:8 — The most popular intermittent fasting plan
• 14:10 — A gentler start for beginners
• 18:6 — A longer fast for experienced users
• 20:4 — The Warrior Diet window
• 23:1 (OMAD) — One Meal A Day
• Custom — Set your own fasting and eating windows

Lightweight. Private. No clutter. Download FastSloth today.