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.
Ratings & Reviews
5.0
out of 5
1 Ratings
Bug fixes
Version 1.3.2
The developer, Darren Paul, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Purchases
Identifiers
Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
Purchases
Identifiers
Usage Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Larger Text
Dark Interface
Differentiate Without Color Alone
Sufficient Contrast
Reduced Motion
Information
Seller
Darren Paul
Size
9.9 MB
Category
Health & Fitness
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.