Calorie Tracker Guide · 2026-11-14
Verdict
Lumen - Metabolic Coach is marked for Coach connection. Senza: Keto & Fasting is not. Senza: Keto & Fasting is marked for Barcode scanner, Apple Health. Lumen - Metabolic Coach is not. Editorial scores are 6 for Lumen - Metabolic Coach and 5.2 for Senza: Keto & Fasting, on a 10-point scale. That score is not the store rating.
Price
Lumen - Metabolic Coach: Free.
Senza: Keto & Fasting: Free.
Features that differ
Barcode scanner: only Senza: Keto & Fasting is marked available.
Apple Health: only Senza: Keto & Fasting is marked available. Mentioned in the App Store description.
Coach connection: only Lumen - Metabolic Coach is marked available. Mentioned in the App Store description.
Fit
Lumen - Metabolic Coach has no best-fit line.
Senza: Keto & Fasting has no best-fit line.
Where the scores differ
Feature depth: Lumen - Metabolic Coach 3.1, Senza: Keto & Fasting 2.3. Lumen - Metabolic Coach: Quality-weighted share of tracked features available (excellent 1.0 .. poor 0.2), x1.6, capped at 10. Senza: Keto & Fasting: Quality-weighted share of tracked features available (excellent 1.0 .. poor 0.2), x1.6, capped at 10.
User feedback: Lumen - Metabolic Coach 6.5, Senza: Keto & Fasting 9. Lumen - Metabolic Coach: Bayesian rating 4.43 (iOS 4.59x6543 + Play 4.12x3395, prior 4.3x200) + review stars sentiment -0.30 over 20 reviews. Senza: Keto & Fasting: Bayesian rating 4.72 (iOS 4.78x10816 + Play 4.44x1907, prior 4.3x200) + review stars sentiment +0.45 over 20 reviews.
Maintenance: Lumen - Metabolic Coach 8.5, Senza: Keto & Fasting 1.7. Lumen - Metabolic Coach: Last release 6 days ago (half-life 90d, 70%) + median 20 days between releases (30%). Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%).
Traction: Lumen - Metabolic Coach 6.7, Senza: Keto & Fasting 6.8. Lumen - Metabolic Coach: log10 of 9938 total ratings (iOS+Play), 1M ratings = 10. Senza: Keto & Fasting: log10 of 12723 total ratings (iOS+Play), 1M ratings = 10.
Coachability: Lumen - Metabolic Coach 5.5, Senza: Keto & Fasting 0. Lumen - Metabolic Coach: Best quality of aiCoach / coachConnection features. Senza: Keto & Fasting: Best quality of aiCoach / coachConnection features.
Who should pick which
Choose Lumen - Metabolic Coach if you need Coach connection. Choose Senza: Keto & Fasting if you need Barcode scanner and Apple Health.