Calorie Tracker Guide · 2026-11-14
Verdict
Senza: Keto & Fasting prices as Free. Trifecta: Diet & Weight Loss prices as Free · 5 in-app purchase option(s). Senza: Keto & Fasting is marked for Apple Health, Fasting. Trifecta: Diet & Weight Loss is not. Trifecta: Diet & Weight Loss is marked for Water tracking, Coach connection. Senza: Keto & Fasting is not. Editorial scores are 5.2 for Senza: Keto & Fasting and 4.5 for Trifecta: Diet & Weight Loss, on a 10-point scale. That score is not the store rating.
Price
Senza: Keto & Fasting: Free.
Trifecta: Diet & Weight Loss: Free · 5 in-app purchase option(s).
Monthly figure: Senza: Keto & Fasting unknown, Trifecta: Diet & Weight Loss $12.99.
Yearly figure: Senza: Keto & Fasting unknown, Trifecta: Diet & Weight Loss $59.99.
Features that differ
Apple Health: only Senza: Keto & Fasting is marked available. Mentioned in the App Store description.
Water tracking: only Trifecta: Diet & Weight Loss is marked available. Mentioned in the App Store description.
Fasting: only Senza: Keto & Fasting is marked available. Mentioned in the App Store description.
Coach connection: only Trifecta: Diet & Weight Loss is marked available. Mentioned in the App Store description.
Fit
Senza: Keto & Fasting has no best-fit line.
Trifecta: Diet & Weight Loss has no best-fit line.
Where the scores differ
Pricing value: Senza: Keto & Fasting 10, Trifecta: Diet & Weight Loss 6. Senza: Keto & Fasting: 10 - annualised price $0.00/15 (+0.5 if free trial). Trifecta: Diet & Weight Loss: 10 - annualised price $59.99/15 (+0.5 if free trial).
Feature depth: Senza: Keto & Fasting 2.3, Trifecta: Diet & Weight Loss 2.7. Senza: Keto & Fasting: Quality-weighted share of tracked features available (excellent 1.0 .. poor 0.2), x1.6, capped at 10. Trifecta: Diet & Weight Loss: Quality-weighted share of tracked features available (excellent 1.0 .. poor 0.2), x1.6, capped at 10.
User feedback: Senza: Keto & Fasting 9, Trifecta: Diet & Weight Loss 3.2. Senza: Keto & Fasting: Bayesian rating 4.72 (iOS 4.78x10816 + Play 4.44x1907, prior 4.3x200) + review stars sentiment +0.45 over 20 reviews. Trifecta: Diet & Weight Loss: Bayesian rating 3.98 (iOS 4.26x1478 + Play 3.61x1304, prior 4.3x200) + review stars sentiment -0.45 over 20 reviews.
Maintenance: Senza: Keto & Fasting 1.7, Trifecta: Diet & Weight Loss 6.4. Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%). Trifecta: Diet & Weight Loss: Last release 51 days ago (half-life 90d, 70%) + median 23 days between releases (30%).
Traction: Senza: Keto & Fasting 6.8, Trifecta: Diet & Weight Loss 5.7. Senza: Keto & Fasting: log10 of 12723 total ratings (iOS+Play), 1M ratings = 10. Trifecta: Diet & Weight Loss: log10 of 2782 total ratings (iOS+Play), 1M ratings = 10.
Coachability: Senza: Keto & Fasting 0, Trifecta: Diet & Weight Loss 5.5. Senza: Keto & Fasting: Best quality of aiCoach / coachConnection features. Trifecta: Diet & Weight Loss: Best quality of aiCoach / coachConnection features.
Who should pick which
Choose Senza: Keto & Fasting if you need Apple Health and Fasting. Choose Trifecta: Diet & Weight Loss if you need Water tracking and Coach connection.