Calorie Tracker Guide · 2026-11-14
Verdict
Prime: Intermittent Fasting prices as Free · 9 in-app purchase option(s). Senza: Keto & Fasting prices as Free. Prime: Intermittent Fasting is marked for Water tracking. Senza: Keto & Fasting is not. Senza: Keto & Fasting is marked for Barcode scanner, Macro tracking. Prime: Intermittent Fasting is not. Editorial scores are 5.6 for Prime: Intermittent Fasting and 5.2 for Senza: Keto & Fasting, on a 10-point scale. That score is not the store rating.
Price
Prime: Intermittent Fasting: Free · 9 in-app purchase option(s).
Senza: Keto & Fasting: Free.
Features that differ
Barcode scanner: only Senza: Keto & Fasting is marked available.
Macro tracking: only Senza: Keto & Fasting is marked available. Mentioned in the App Store description.
Water tracking: only Prime: Intermittent Fasting is marked available. Mentioned in the App Store description.
Fit
Prime: Intermittent Fasting has no best-fit line.
Senza: Keto & Fasting has no best-fit line.
Where the scores differ
Pricing value: Prime: Intermittent Fasting 6.5, Senza: Keto & Fasting 10. Prime: Intermittent Fasting: 10 - annualised price $59.99/15 (+0.5 if free trial). Senza: Keto & Fasting: 10 - annualised price $0.00/15 (+0.5 if free trial).
Feature depth: Prime: Intermittent Fasting 3.4, Senza: Keto & Fasting 2.3. Prime: Intermittent Fasting: 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: Prime: Intermittent Fasting 7.8, Senza: Keto & Fasting 9. Prime: Intermittent Fasting: Bayesian rating 4.63 (iOS 4.65x4602 + Play 0.00x0, prior 4.3x200) + review stars sentiment -0.50 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: Prime: Intermittent Fasting 3.3, Senza: Keto & Fasting 1.7. Prime: Intermittent Fasting: Last release 194 days ago (half-life 90d, 70%) + median 22 days between releases (30%). Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%).
Traction: Prime: Intermittent Fasting 6.1, Senza: Keto & Fasting 6.8. Prime: Intermittent Fasting: log10 of 4602 total ratings (iOS+Play), 1M ratings = 10. Senza: Keto & Fasting: log10 of 12723 total ratings (iOS+Play), 1M ratings = 10.
Coachability: Prime: Intermittent Fasting 5.5, Senza: Keto & Fasting 0. Prime: Intermittent Fasting: Best quality of aiCoach / coachConnection features. Senza: Keto & Fasting: Best quality of aiCoach / coachConnection features.
Who should pick which
Choose Prime: Intermittent Fasting if you need Water tracking. Choose Senza: Keto & Fasting if you need Barcode scanner and Macro tracking.