The 5:2 Fast Diet Calculator, Tracker & Planner is a lifestyle app developed by APP KTCHN LTD for iPhone users. The app is designed to help 5:2 diet followers keep track of their daily calorie intake and plan their meals accordingly. The app offers a simple and easy-to-use interface that allows users to calculate their Rest Day Calorie Intake and Fast Day intake.

The app uses a unique algorithm that takes into account the user's gender, age, weight, height, and normal activity level to calculate their Rest Day Calorie Intake. This personalized feature allows users to get the most out of their 5:2 diet and achieve faster results. Additionally, the app offers a 5:2 diet planner that allows users to plan their meals for the week and keep track of their progress.

Overall, the 5:2 Fast Diet Calculator, Tracker & Planner is a must-have app for anyone following the 5:2 diet. Its personalized features and easy-to-use interface make it an essential tool for achieving your weight loss goals.