ΔDelta

ΔDelta tracks your weight and calorie intake and uses that data to calculate 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 number based on height, weight, age, and activity level. That number is a starting point, not a measurement. Delta starts there too, but as you log data, it transitions to an empirical estimate derived from what you actually eat and how your weight actually moves. The longer you log, the more accurate it gets.
How it works
Log your weight and calorie intake each day. Delta computes a 7-day average to filter out noise from water retention and normal fluctuation. It then combines your intake data with observed weight change to estimate your true maintenance calories. That estimate is smoothed over four weeks 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:
• Track daily weight and calorie intake
• Adaptive TDEE targets that adjust as you log more data
• Trend analysis and smoothing for real progress
• Science-backed formulas combined with real-world tracking
Why "Delta"?
• Δ between your current weight and goal drives energy needs
• Δ between calories in and out shapes your progress
• Δ between real-world TDEE and target guides daily intake
• Δ between existing apps and what we needed inspired Delta