Calorie Tracker Guide · 2026-11-14
Verdict
Fast: Fasting Tracker & Timer prices as Free · 8 in-app purchase option(s). Senza: Keto & Fasting prices as Free. Fast: Fasting Tracker & Timer is marked for Water tracking. Senza: Keto & Fasting is not. Senza: Keto & Fasting is marked for Barcode scanner, Apple Health, Macro tracking. Fast: Fasting Tracker & Timer is not. Editorial scores are 5.1 for Fast: Fasting Tracker & Timer and 5.2 for Senza: Keto & Fasting, on a 10-point scale. That score is not the store rating.
Price
Fast: Fasting Tracker & Timer: Free · 8 in-app purchase option(s).
Senza: Keto & Fasting: Free.
Monthly figure: Fast: Fasting Tracker & Timer $14.99, Senza: Keto & Fasting unknown.
Yearly figure: Fast: Fasting Tracker & Timer $39.99, Senza: Keto & Fasting unknown.
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.
Macro tracking: only Senza: Keto & Fasting is marked available. Mentioned in the App Store description.
Water tracking: only Fast: Fasting Tracker & Timer is marked available. Mentioned in the App Store description.
Fit
Fast: Fasting Tracker & Timer has no best-fit line.
Senza: Keto & Fasting has no best-fit line.
Where the scores differ
Pricing value: Fast: Fasting Tracker & Timer 7.3, Senza: Keto & Fasting 10. Fast: Fasting Tracker & Timer: 10 - annualised price $39.99/15 (+0.5 if free trial). Senza: Keto & Fasting: 10 - annualised price $0.00/15 (+0.5 if free trial).
User feedback: Fast: Fasting Tracker & Timer 8.4, Senza: Keto & Fasting 9. Fast: Fasting Tracker & Timer: Bayesian rating 4.64 (iOS 4.66x3311 + 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: Fast: Fasting Tracker & Timer 4.8, Senza: Keto & Fasting 1.7. Fast: Fasting Tracker & Timer: Last release 81 days ago (half-life 90d, 70%) + median 57 days between releases (30%). Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%).
Traction: Fast: Fasting Tracker & Timer 5.9, Senza: Keto & Fasting 6.8. Fast: Fasting Tracker & Timer: log10 of 3311 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 Fast: Fasting Tracker & Timer if you need Water tracking. Choose Senza: Keto & Fasting if you need Barcode scanner and Apple Health.