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TDEE.app is a free TDEE calculator operated by Apperitif Limited in the UK, designed for users who want to lose fat, gain muscle, or maintain their weight. Based on age, gender, height, weight, and activity level, it can quickly estimate BMI, BMR, and total daily energy expenditure (TDEE). The product is available on the web, as well as through iOS and Android apps and a Chrome extension.
From an AI application perspective, TDEE.app does not have a strong “AI” component. The website clearly states that its articles are AI-assisted and manually reviewed, but the calculator itself mainly relies on traditional formulas, including the recommended Mifflin-St Jeor formula, as well as Harris-Benedict and Katch-McArdle. It supports metric and imperial units, five activity levels, and uses activity multipliers to estimate daily energy expenditure. The iOS version also provides macronutrient recommendations, while the mobile apps can save history, work offline, and remove ads.
The web calculator is free, and the copy emphasizes simplicity, accessibility, and no need to register. The mobile apps offer a TDEE Pro subscription, with payments and renewals handled through the Apple App Store and Google Play Billing; subscriptions can be canceled in the corresponding account. The captured content does not disclose specific pricing or indicate whether a free trial is available.
The main advantages are that it is extremely easy to use, requires only minimal input, and is suitable for quickly establishing a calorie baseline. It uses common formulas, and the FAQ explains TDEE, BMR, activity levels, fat-loss calorie deficits, and related concepts fairly clearly. Its multi-platform availability also improves convenience. The drawbacks are that the results are essentially estimates. The official site also notes that they are affected by genetics, muscle mass, metabolic health, and input accuracy, and should be adjusted based on real-world changes over 2–4 weeks. It does not constitute medical or nutritional advice. It does not disclose an API, deep integrations, Chinese-language support, or detailed privacy implementation, making it relatively lightweight as a professional nutrition management system.
It is suitable for general fitness users, people managing their weight, personal trainers, or nutritionists as an initial reference when discussing calorie targets. It is not suitable for people who need medical-grade nutrition intervention, disease-specific dietary management, or highly personalized metabolic assessment. Access from mainland China is not mentioned in the text, so its availability is unknown.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on tdee.app official site.
tdee.app is an Unknown Health provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach tdee.app directly.