Calorie Tracker Guide · 2026-11-14
Verdict
Senza: Keto & Fasting prices as Free. Water tracker Waterllama prices as Free · 5 in-app purchase option(s). Senza: Keto & Fasting is marked for Barcode scanner, Macro tracking. Water tracker Waterllama is not. Water tracker Waterllama is marked for Water tracking. Senza: Keto & Fasting is not. Editorial scores are 5.2 for Senza: Keto & Fasting and 6.4 for Water tracker Waterllama, on a 10-point scale. That score is not the store rating.
Price
Senza: Keto & Fasting: Free.
Water tracker Waterllama: Free · 5 in-app purchase option(s).
Monthly figure: Senza: Keto & Fasting unknown, Water tracker Waterllama $0.99.
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 Water tracker Waterllama is marked available. Mentioned in the App Store description.
Fit
Senza: Keto & Fasting has no best-fit line.
Water tracker Waterllama has no best-fit line.
Where the scores differ
Pricing value: Senza: Keto & Fasting 10, Water tracker Waterllama 9.2. Senza: Keto & Fasting: 10 - annualised price $0.00/15 (+0.5 if free trial). Water tracker Waterllama: 10 - annualised price $11.88/15 (+0.5 if free trial).
Feature depth: Senza: Keto & Fasting 2.3, Water tracker Waterllama 2.7. Senza: Keto & Fasting: Quality-weighted share of tracked features available (excellent 1.0 .. poor 0.2), x1.6, capped at 10. Water tracker Waterllama: Quality-weighted share of tracked features available (excellent 1.0 .. poor 0.2), x1.6, capped at 10.
User feedback: Senza: Keto & Fasting 9, Water tracker Waterllama 10. Senza: Keto & Fasting: Bayesian rating 4.72 (iOS 4.78x10816 + Play 4.44x1907, prior 4.3x200) + review stars sentiment +0.45 over 20 reviews. Water tracker Waterllama: Bayesian rating 4.87 (iOS 4.87x164759 + Play 3.71x114, prior 4.3x200) + review stars sentiment +0.90 over 20 reviews.
Maintenance: Senza: Keto & Fasting 1.7, Water tracker Waterllama 8.3. Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%). Water tracker Waterllama: Last release 11 days ago (half-life 90d, 70%) + median 18 days between releases (30%).
Traction: Senza: Keto & Fasting 6.8, Water tracker Waterllama 8.7. Senza: Keto & Fasting: log10 of 12723 total ratings (iOS+Play), 1M ratings = 10. Water tracker Waterllama: log10 of 164873 total ratings (iOS+Play), 1M ratings = 10.
Who should pick which
Choose Senza: Keto & Fasting if you need Barcode scanner and Macro tracking. Choose Water tracker Waterllama if you need Water tracking.