7700 Kcal Challenge
kyongmook lim Health & Fitness iPhoneiPadiPod touch
7700 Kcal Challenge is a free Health & Fitness app for iPhone and iPad by kyongmook lim. Requires iOS 15.1. Updated January 15, 2026.
- Price
- Free
- on the App Store
- Size
- 42 MB
- Age 12+
- Updated
- Jan 15
- 2026 · v1.0
Screenshots
About 7700 Kcal Challenge
7700 Kcal Challenge - Science-Based Fat Loss Goals! Why 7700 kcal? To lose 1kg of body fat, you need an energy deficit of approximately 7,700 kcal¹². This scientific principle was established by Dr. Max Wishnofsky in 1958 and is widely cited in medical literature worldwide³. Our app uses this evidence-based approach to provide clear, achievable goals. Key Features 【Apple Watch Integration】 • Real-time calorie tracking via HealthKit • Accurate tracking of all activities - workouts and daily movement 【AI-Powered Workout Recommendations】 • Personalized exercise programs based on your body type, experience, and goals • Fresh daily routines to keep you motivated 【Challenge Mode】 • Choose 1-week, 2-week, or 1-month periods • Systematic progress tracking toward your 7700kcal goal 【Battles & Raids】 • Compete with friends in calorie battles for extra motivation • Team raids to achieve goals together 【Missions & Achievements】 • Daily/weekly missions to build consistent exercise habits • Various achievements and rewards to boost your sense of accomplishment 【Points System】 • Earn points as you exercise • Get rewards for attendance, missions, and achievements Perfect For • Anyone with weight loss goals • Those wanting to build exercise habits • People who struggle with motivation when exercising alone • Anyone seeking a science-based approach to fitness Start today. Experience healthy transformation with the 7700kcal Challenge! References: ¹ Wishnofsky M. Caloric equivalents of gained or lost weight. Am J Clin Nutr. 1958;6(5):542-546 ² Hall KD. What is the required energy deficit per unit weight loss? Int J Obes. 2008;32(3):573-576 ³ Thomas DM, et al. Can a weight loss of one pound a week be achieved with a 3500-kcal deficit? Int J Obes. 2013;37(12):1611-1613
App privacy
The developer, kyongmook lim, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data: Product Interaction, Advertising Data
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Identifiers: User ID
- Usage Data: Product Interaction
Used for: Third-Party Advertising, Analytics, Product Personalization, App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Usage Data: Advertising Data
- Health & Fitness: Health, Fitness
Used for: Third-Party Advertising, Product Personalization, App Functionality
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