KritFit

Your targets are calculated from your age, sex, height, weight and lifestyle using the Mifflin-St Jeor formula — the most clinically validated BMR method. Not a flat 2,000 kcal. Your number.

Photograph your plate and let AI identify every item. KritFit uses a structured prompt system with Gemini, ChatGPT or Claude — free services you already have — returning precise macro data. No per-photo fees. Ever.

Search 750,000+ foods from the USDA FoodData Central database and Open Food Facts. Whole foods appear first. Smart serving sizes — teaspoons for honey, cups for oats. Intelligent, not just comprehensive.

Fitbit, Garmin, Apple Watch, bike computers, gym treadmills, rowing machines — add any device by name. Its calories appear as a one-tap button in your exercise log. Device readings are often more accurate than any formula because they use your actual heart rate.

Plan every single day of a fitness period — what you will eat, what exercise you will do, or mark it a rest day. Every day must be filled before the plan can activate. No vague goals. Just a complete, executable strategy.

Activate a Period Plan and KritFit offers to add every planned exercise day to your Google Calendar with automatic morning reminders. Your training schedule lives where your life is scheduled. Optional. One tap.

Calorie burn is calculated using MET (Metabolic Equivalent of Task) values personalised to your current body weight — not a static lookup table. Update your weight and every past and future burn estimate recalculates automatically.

Build multi-ingredient recipes using the same USDA search. Each ingredient gets its own quantity and serving size. Save and log the entire recipe as one entry — with a combined calorie and protein total.

Everything — your profile, food log, exercise history, plans, recipes — syncs to your private Firebase account. Access from any device. Your data follows you. No cloud subscription required: Firebase's free tier covers all personal use.