Calorie Tracker Guide · 2026-11-14
Verdict
Senza: Keto & Fasting prices as Free. Sleep Cycle - Tracker & Sounds prices as Free · 9 in-app purchase option(s). Senza: Keto & Fasting is marked for Barcode scanner, Macro tracking, Fasting. Sleep Cycle - Tracker & Sounds is not. Editorial scores are 5.2 for Senza: Keto & Fasting and 5.7 for Sleep Cycle - Tracker & Sounds, on a 10-point scale. That score is not the store rating.
Price
Senza: Keto & Fasting: Free.
Sleep Cycle - Tracker & Sounds: Free · 9 in-app purchase option(s).
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.
Fasting: only Senza: Keto & Fasting is marked available. Mentioned in the App Store description.
Fit
Senza: Keto & Fasting has no best-fit line.
Sleep Cycle - Tracker & Sounds has no best-fit line.
Where the scores differ
Pricing value: Senza: Keto & Fasting 10, Sleep Cycle - Tracker & Sounds 6.1. Senza: Keto & Fasting: 10 - annualised price $0.00/15 (+0.5 if free trial). Sleep Cycle - Tracker & Sounds: 10 - annualised price $57.99/15 (+0.5 if free trial).
Feature depth: Senza: Keto & Fasting 2.3, Sleep Cycle - Tracker & Sounds 1.9. Senza: Keto & Fasting: Quality-weighted share of tracked features available (excellent 1.0 .. poor 0.2), x1.6, capped at 10. Sleep Cycle - Tracker & Sounds: Quality-weighted share of tracked features available (excellent 1.0 .. poor 0.2), x1.6, capped at 10.
User feedback: Senza: Keto & Fasting 9, Sleep Cycle - Tracker & Sounds 6.3. Senza: Keto & Fasting: Bayesian rating 4.72 (iOS 4.78x10816 + Play 4.44x1907, prior 4.3x200) + review stars sentiment +0.45 over 20 reviews. Sleep Cycle - Tracker & Sounds: Bayesian rating 4.37 (iOS 4.68x32058 + Play 4.33x218670, prior 4.3x200) + review stars sentiment +0.10 over 20 reviews.
Maintenance: Senza: Keto & Fasting 1.7, Sleep Cycle - Tracker & Sounds 9.3. Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%). Sleep Cycle - Tracker & Sounds: Last release 2 days ago (half-life 90d, 70%) + median 7 days between releases (30%).
Traction: Senza: Keto & Fasting 6.8, Sleep Cycle - Tracker & Sounds 9. Senza: Keto & Fasting: log10 of 12723 total ratings (iOS+Play), 1M ratings = 10. Sleep Cycle - Tracker & Sounds: log10 of 250728 total ratings (iOS+Play), 1M ratings = 10.
Coachability: Senza: Keto & Fasting 0, Sleep Cycle - Tracker & Sounds 5.5. Senza: Keto & Fasting: Best quality of aiCoach / coachConnection features. Sleep Cycle - Tracker & Sounds: Best quality of aiCoach / coachConnection features.
Who should pick which
Choose Senza: Keto & Fasting if you need Barcode scanner and Macro tracking.