--- title: "Cardia Fast - Reviews, Revenue and Downloads in United States | Apple App Store" description: "**Cardia Fast** turns intermittent fasting into metabolic science. Track your fasts through 5 research-backed zones, align with your circadian rhythm using sunset detection, and learn what's happening" --- # Cardia Fast — United States > Circadian Fasting Tracker ![Cardia Fast App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/ff/71/0e/ff710e67-ed4b-daec-a8a3-31dcbcaecd6d/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png) **Developer:** [Tuong Nguyen](https://apptail.io/developer/tuong-nguyen-dNNSFb) **Category:** Health Fitness **Rating:** N/A (0 ratings) **Price:** Free **Bundle ID:** com.keendigital.cardiafast **Store:** Apple App Store **Country:** United States **Version:** 1.0.0 (released 2026-02-25) **Original Release:** 2026-02-25 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6759427127) **AppTail Page:** [https://apptail.io/app/cardia-fast-FcGy/united-states](https://apptail.io/app/cardia-fast-FcGy/united-states) ## Cardia Fast Description **Cardia Fast** turns intermittent fasting into metabolic science. Track your fasts through 5 research-backed zones, align with your circadian rhythm using sunset detection, and learn what's happening in your body at every stage. **Solar Dial Timer** A beautiful 24-hour ring shows your fasting progress in real time. Watch your zone change from Fed → Fat Burning → Ketosis → Autophagy → Deep Autophagy as your fast progresses. **5 Metabolic Zones** Not all fasting hours are equal. Cardia Fast tracks the metabolic stage of every fast — so you know exactly when your body starts burning fat, entering ketosis, and triggering autophagy. **Circadian Mode** Fast with the sun. Enable sunset-aware fasting and let Cardia Fast calculate your optimal eating window based on your local sunset time — the way your body was designed to eat. **Morning Debrief** Start each day with a personalized summary — your streak, last fast duration, zone reached, and a motivational message to keep you going. **Fasting Score** Get a weekly score (0–100) based on consistency, duration, and depth. See exactly where you're excelling and where you can improve. **12 Achievement Badges** Unlock milestones like First Fast, Week Warrior, Fat Burner, Autophagy Ace, and more. Track your progress without cartoon gimmicks. **PRO FEATURES** Unlock Circadian Coach tips, pattern analysis, weight correlation charts, weekly summaries, micro-journaling, vacation mode, and data export — all with a single subscription. **CARDIA COMPLETE** Access all Cardia apps with a single subscription — Heart, Mind, Sleep, Steps, Hydrate, Fast, and more. One ecosystem for your complete wellness journey. **PRIVACY FIRST** All health data stays on your device. No accounts required. No data leaves your phone. Download Cardia Fast and start fasting with the science. Terms of Use (EULA): Privacy Policy: ## Cardia Fast Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/48/c2/96/48c296cf-9d09-3968-c00f-b3f6b0cdd319/01_dashboard.png/1242x2688.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/71/77/0c/71770cfb-e5be-560a-28f1-7e1a8b8a74d6/06_presets.png/1242x2688.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/a1/da/d3/a1dad3ed-7e2f-eb93-37eb-f67790e3cda6/07_active_timer.png/1242x2688.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/77/6f/18/776f18a3-0055-8971-5268-e28dee587ba9/08_mood_energy.png/1242x2688.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/92/69/bf/9269bf6d-9c23-3c9c-7100-5214cba65eca/01_dashboard.png/1242x2688.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/61/5e/e6/615ee6a8-b611-ea02-5c05-931d4c5d7ab8/04_learn.png/1242x2688.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/51/de/1e/51de1e13-2ec9-2e52-4608-3858a88bad64/05_settings.png/1242x2688.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/96/a5/91/96a591bc-1811-fa48-ad8c-8aa51cce546b/03_pro.png/1242x2688.png) ## Cardia Fast In-App Purchases | Item | Price | |------|-------| | Cardia Fast Pro | $14.99 | ## Cardia Fast Available In - [Denmark](https://apptail.io/app/cardia-fast-FcGy/denmark) - [Finland](https://apptail.io/app/cardia-fast-FcGy/finland) - [Nigeria](https://apptail.io/app/cardia-fast-FcGy/nigeria) - [Russia](https://apptail.io/app/cardia-fast-FcGy/russia) - [United States](https://apptail.io/app/cardia-fast-FcGy/united-states) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*