Calorie Tracker Guide · 2026-11-14
Verdict
Fastin: Intermittent Fasting prices as Free · 8 in-app purchase option(s). Senza: Keto & Fasting prices as Free. Fastin: Intermittent Fasting is marked for Water tracking. Senza: Keto & Fasting is not. Senza: Keto & Fasting is marked for Barcode scanner, Macro tracking. Fastin: Intermittent Fasting is not.
Price
Fastin: Intermittent Fasting: Free · 8 in-app purchase option(s).
Senza: Keto & Fasting: Free.
Monthly figure: Fastin: Intermittent Fasting $9.99, Senza: Keto & Fasting unknown.
Yearly figure: Fastin: Intermittent Fasting $49.99, Senza: Keto & Fasting unknown.
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 Fastin: Intermittent Fasting is marked available. Mentioned in the App Store description.
Fit
Fastin: Intermittent Fasting has no best-fit line.
Senza: Keto & Fasting has no best-fit line.
Where the scores differ
Pricing value: Fastin: Intermittent Fasting 6.7, Senza: Keto & Fasting 10. Fastin: Intermittent Fasting: 10 - annualised price $49.99/15 (+0.5 if free trial). Senza: Keto & Fasting: 10 - annualised price $0.00/15 (+0.5 if free trial).
Feature depth: Fastin: Intermittent Fasting 3.1, Senza: Keto & Fasting 2.3. Fastin: 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: Fastin: Intermittent Fasting 8.5, Senza: Keto & Fasting 9. Fastin: Intermittent Fasting: Bayesian rating 4.72 (iOS 4.84x10154 + Play 4.51x4992, prior 4.3x200) + review stars sentiment -0.55 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: Fastin: Intermittent Fasting 3.5, Senza: Keto & Fasting 1.7. Fastin: Intermittent Fasting: Last release 185 days ago (half-life 90d, 70%) + median 19 days between releases (30%). Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%).
Traction: Fastin: Intermittent Fasting 7, Senza: Keto & Fasting 6.8. Fastin: Intermittent Fasting: log10 of 15146 total ratings (iOS+Play), 1M ratings = 10. Senza: Keto & Fasting: log10 of 12723 total ratings (iOS+Play), 1M ratings = 10.
Who should pick which
Choose Fastin: Intermittent Fasting if you need Water tracking. Choose Senza: Keto & Fasting if you need Barcode scanner and Macro tracking.