Delta vs Fitzenia

Delta tracks your weight and calorie intake and calculates your real TDEE — not a formula estimate, your actual one. 10 days free. One payment for unlimited access. No subscription. Most apps give you a TDEE based on height, weight, age, and activity level. That number is a population average applied to you. It's a starting point, not a measurement. Delta starts there too, but transitions away from it as you log real data. By day 10 your estimate is derived entirely from what you actually eat and how your weight actually moves. The longer you log, the more accurate it gets. Log your weight each morning and your calorie intake each day. Delta averages the last 10 days to filter out noise from water retention and normal fluctuation. It combines your intake with observed weight change to estimate your true maintenance calories, then smooths that estimate over 28 days to avoid overreacting to short-term variance. The result is a daily calorie target adjusted for your goal — cut, maintain, or bulk — grounded in your data rather than population averages. Key features: Daily weight and calorie logging Adaptive TDEE that transitions from formula to fully empirical as you log 28-day smoothing for a stable, actionable number Goal-based calorie targets for cut, maintain, or bulk Apple Health integration — weight and TDEE baseline written automatically Daily reminders for weigh-in and calorie logging Why Delta? Δ is the symbol for change. Your weight change and calorie balance are what actually determine your TDEE. Delta measures both and gives you a number that reflects your reality, not someone else's average.

Fitzenia is a calorie and macro tracker built for body recomposition — cutting, bulking, maintaining, reverse dieting — with calorie targets that adapt to your real weight trend and an AI coach grounded in what you actually log. Most tracking apps hand you a static calorie number and leave you alone with it. Fitzenia treats your log as evidence: it learns your real energy needs from your data, adjusts your plan as your body changes, and now puts a coach on top that can actually explain what is going on. MEET FITZY — AN AI COACH THAT READS YOUR DATA Fitzy is not a generic chatbot. Before answering, it reviews your profile, goals, calorie targets, today's meals, and your weight trend — you can watch it check your diary in real time. Ask why your weight stalled this week, whether your protein is on track, or how to handle a restaurant weekend mid-cut, and the answer is about you, not about an average person. - Grounded in your logged food, weight entries, targets, and goals - Remembers your preferences across conversations with Coach Notes - You decide when to enable it, and you can review and delete what it saves - Honest guidance for nutrition and training questions ADAPTIVE TDEE THAT LEARNS FROM YOU Your true daily energy expenditure (TDEE) is recalculated from what you eat and how your weight actually moves. No resetting your plan every two weeks, and no pretending a textbook formula knows your metabolism better than your own data does. PHASES THAT MATCH YOUR GOAL Cut, bulk, maintain, reverse diet, or recomp. Switch phases when your goal changes, and your calorie target, macro split, and pace adapt with you. LOG FOOD WITHOUT THE FRICTION - Barcode scanning — always free - AI meal photo logging: snap a plate, review the estimate, adjust, log - Custom foods, saved meals, and one-tap re-logging - Smart suggestions when it is time for your usual meal - Meal reminders with quick-add straight from the notification SEE YOUR GOAL COME INTO FOCUS The AI body projection turns your starting point, goal weight, and estimated body fat into visual previews of your transformation along the way. Previews are estimates and clearly labeled as such — motivation, not a promise. PROGRESS BEYOND THE SCALE - Weight, body fat percentage, and BMI trends with weekly averaging - Four-pose progress photos (front, sides, back) with a comparison slider - On-device AI insights that put your week into words, on supported devices CONNECTED AND DEPENDABLE - Syncs weight, steps, and activity with Apple Health - Offline-first: your diary works without a connection and syncs later - Your data follows you across devices BUILT ON EVIDENCE Calorie and macro guidance follows published sources — Mifflin-St Jeor for resting metabolic rate, CDC references for BMI, ISSN recommendations for protein — and the app shows you those sources. Food data draws on Open Food Facts and a curated food database. FREE AND PREMIUM Free: calorie and macro logging, barcode scanning, custom foods, saved meals, weight and BMI tracking, and progress photos. Premium adds the AI Coach, adaptive TDEE updates, AI meal photo logging, AI body projections, and AI insights. The coach runs on a monthly usage budget, with optional top-ups if you need more. Fitzenia is for adults and does not provide medical advice. AI estimates and coaching are informational — always consult a qualified professional for medical decisions. Privacy Policy: https://fitzenia.com/privacy-policy Terms and conditions Policy: https://fitzenia.com/terms-and-conditions Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Questions or ideas? support@fitzenia.com