Calorie Tracker Guide · 2026-11-14
Verdict
Nutron: Food Scanner prices as Free · 6 in-app purchase option(s). Senza: Keto & Fasting prices as Free. Nutron: Food Scanner is marked for Water tracking. Senza: Keto & Fasting is not. Senza: Keto & Fasting is marked for Apple Health, Workout tracking, Fasting. Nutron: Food Scanner is not. Editorial scores are 4.7 for Nutron: Food Scanner and 5.2 for Senza: Keto & Fasting, on a 10-point scale. That score is not the store rating.
Price
Nutron: Food Scanner: Free · 6 in-app purchase option(s).
Senza: Keto & Fasting: Free.
Features that differ
Apple Health: only Senza: Keto & Fasting is marked available. Mentioned in the App Store description.
Water tracking: only Nutron: Food Scanner is marked available. Mentioned in the App Store description.
Workout 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
Nutron: Food Scanner has no best-fit line.
Senza: Keto & Fasting has no best-fit line.
Where the scores differ
Pricing value: Nutron: Food Scanner 7.8, Senza: Keto & Fasting 10. Nutron: Food Scanner: 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).
Feature depth: Nutron: Food Scanner 1.1, Senza: Keto & Fasting 2.3. Nutron: Food Scanner: 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: Nutron: Food Scanner 7.4, Senza: Keto & Fasting 9. Nutron: Food Scanner: Bayesian rating 4.56 (iOS 4.61x1076 + Play 0.00x0, prior 4.3x200) + review stars sentiment -0.40 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: Nutron: Food Scanner 5.9, Senza: Keto & Fasting 1.7. Nutron: Food Scanner: Last release 98 days ago (half-life 90d, 70%) + median 5 days between releases (30%). Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%).
Traction: Nutron: Food Scanner 5.1, Senza: Keto & Fasting 6.8. Nutron: Food Scanner: log10 of 1076 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 Nutron: Food Scanner if you need Water tracking. Choose Senza: Keto & Fasting if you need Apple Health and Workout tracking.