Calorie Tracker Guide · 2026-11-14
Verdict
Nerva: Gut-Brain Program prices as Free · 4 in-app purchase option(s). Senza: Keto & Fasting prices as Free. Nerva: Gut-Brain Program is marked for Coach connection. Senza: Keto & Fasting is not. Senza: Keto & Fasting is marked for Barcode scanner, Apple Health, Macro tracking. Nerva: Gut-Brain Program is not. Editorial scores are 5.3 for Nerva: Gut-Brain Program and 5.2 for Senza: Keto & Fasting, on a 10-point scale. That score is not the store rating.
Price
Nerva: Gut-Brain Program: Free · 4 in-app purchase option(s).
Senza: Keto & Fasting: Free.
Monthly figure: Nerva: Gut-Brain Program $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.
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.
Coach connection: only Nerva: Gut-Brain Program is marked available. Mentioned in the App Store description.
Fit
Nerva: Gut-Brain Program has no best-fit line.
Senza: Keto & Fasting has no best-fit line.
Where the scores differ
Pricing value: Nerva: Gut-Brain Program 0, Senza: Keto & Fasting 10. Nerva: Gut-Brain Program: 10 - annualised price $1188.00/15 (+0.5 if free trial). Senza: Keto & Fasting: 10 - annualised price $0.00/15 (+0.5 if free trial).
Feature depth: Nerva: Gut-Brain Program 0.8, Senza: Keto & Fasting 2.3. Nerva: Gut-Brain Program: 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: Nerva: Gut-Brain Program 8.1, Senza: Keto & Fasting 9. Nerva: Gut-Brain Program: Bayesian rating 4.62 (iOS 4.68x15269 + Play 4.50x6605, prior 4.3x200) + review stars sentiment +0.30 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: Nerva: Gut-Brain Program 9.2, Senza: Keto & Fasting 1.7. Nerva: Gut-Brain Program: Last release 4 days ago (half-life 90d, 70%) + median 7 days between releases (30%). Senza: Keto & Fasting: Last release 332 days ago (half-life 90d, 70%) + median 47 days between releases (30%).
Traction: Nerva: Gut-Brain Program 7.2, Senza: Keto & Fasting 6.8. Nerva: Gut-Brain Program: log10 of 21874 total ratings (iOS+Play), 1M ratings = 10. Senza: Keto & Fasting: log10 of 12723 total ratings (iOS+Play), 1M ratings = 10.
Coachability: Nerva: Gut-Brain Program 5.5, Senza: Keto & Fasting 0. Nerva: Gut-Brain Program: Best quality of aiCoach / coachConnection features. Senza: Keto & Fasting: Best quality of aiCoach / coachConnection features.
Who should pick which
Choose Nerva: Gut-Brain Program if you need Coach connection. Choose Senza: Keto & Fasting if you need Barcode scanner and Apple Health.