> For the complete documentation index, see [llms.txt](https://app.inwisso.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://app.inwisso.com/apps/fastfaster-intermittent-fasting-and-health-tracker.md). # FastFaster: Intermittent Fasting & Health Tracker {% embed url="" %} **Take control of your health journey with FastFaster—a premium, ad-free companion that seamlessly integrates intermittent fasting, weight trends, and workout tracking into one elegant dashboard.** Built specifically for iOS, FastFaster works hand-in-hand with Apple Health (HealthKit) to sync your active workouts and weight logs bidirectionally. Track your fasts in real time directly from your Lock Screen or the Dynamic Island with Live Activities. *** ### Why Choose FastFaster? Intermittent fasting is more than just a timer. It's about understanding your body's biological transitions. FastFaster guides you through the metabolic stages of fasting while helping you track your fitness and weight goals side-by-side. * **Holistic Health Tracking:** No more jumping between three different apps. Fasting, weight, and fitness live under one roof. * **Real-time iOS Integration:** Native Live Activities keep your progress front and center. * **Privacy-First:** We never sell or upload your personal health or HealthKit data. Your data stays on your device and in your secure iCloud. * **100% Ad-Free:** Focus on your health goals without annoying popups or video ads. *** ### Core Features #### ⏱️ Smart Fasting Timer & Presets Track your elapsed and remaining fasting duration with a premium, smooth visual progress ring. Choose from 5 presets representing key biological and metabolic phases: * **Anabolic Phase (0–4h):** The body digests your last meal and stores glucose. * **Catabolic Phase (4–16h):** Blood glucose levels fall and glycogen storage is utilized (Ideal for standard 16:8 plans). * **Fat Burn Phase (16–24h):** Gluconeogenesis begins and fat stores become the primary energy source. * **Ketosis Phase (24–72h):** Ketone production increases, enhancing mental clarity and cellular repair. * **Deep Ketosis (72–96h):** Prolonged fat burning and metabolic adaptation. #### 🏝️ Live Activities & Dynamic Island Keep track of your active fasts without unlocking your phone. * **Lock Screen Widgets:** Real-time updates showing elapsed time and progress. * **Dynamic Island Support:** A persistent battery-style indicator visualizes your current metabolic phase (Anabolic to Deep Ketosis) dynamically as you go about your day. #### ⚖️ Weight Tracker & Swift Charts Trend Analytics Log and monitor your weight goals with interactive data visualizations. * **Swift Charts Integration:** View your weight trends across the Week, Month, 6 Months, Year, or All-Time. * **Target Weights:** Set a weight goal and track progress with custom circular rings. * **Unit Support:** Seamlessly switch between Kilograms (kg) and Pounds (lb). #### 🏃‍♂️ 70+ Workouts & Activity Rings Stay active and log workouts directly in the app. * **Calorie & Duration Goals:** Track daily active energy (calories) and duration goals with dual concentric progress rings. * **Wide Activity Selection:** Over 70 workout types supported, including HIIT, Strength Training, Running, Cycling, Swimming, Yoga, and Pilates. * **Log Details:** Save duration, active energy burn, and distance. #### 🏥 Bidirectional Apple Health (HealthKit) Sync FastFaster communicates directly with Apple's secure database. * **Auto Weight Sync:** Weight entries entered in Apple Health are imported automatically, and weight logged in FastFaster is written back. * **Auto Workout Sync:** Import workouts logged on your Apple Watch or third-party fitness apps automatically to complete your daily activity rings. *** ### How it Works: The Scientific Phases of Fasting {% code expandable="true" %} ```mermaid graph TD A["0h - Fast Starts"] --> B["Anabolic Phase (0-4h)
Digesting Meal & Storing Glycogen"] B --> C["Catabolic Phase (4-16h)
Using Glycogen & Fat Transition"] C --> D["Fat Burning Phase (16-24h)
Primary Fuel is Body Fat"] D --> E["Ketosis Phase (24-72h)
High Ketone Production & Cellular Repair"] E --> F["Deep Ketosis (72-96h)
Autophagy & Stabilized Fat Burn"] ``` {% endcode %} *** ### Frequently Asked Questions (FAQs) #### Does FastFaster share my HealthKit data? No. FastFaster operates entirely on-device. Your weight and workout data are requested from and saved directly to Apple's HealthKit database. We do not run external servers, and your data is never sold or shared. #### Can I track custom fasting plans? Yes! While we offer 5 scientifically aligned biological presets (from 4 hours to 96 hours), you can edit your fast start/end times and adjust your targets inside the timer menu. #### How do I enable the Dynamic Island and Live Activities? Go to your iPhone **Settings > FastFaster** and ensure **Live Activities** is toggled on. The app will automatically request permissions to start the Dynamic Island widget when you tap "Start Fast" inside the app. *** ### Download FastFaster Today Embark on a healthier, more mindful lifestyle. Track your progress, sync your workouts, and hit your target weight {% embed url="" %} *Contact Support: * --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://app.inwisso.com/apps/fastfaster-intermittent-fasting-and-health-tracker.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.