Calorie Tracker Guide · 2026-11-14
Verdict
My Challenge: Diet Plans prices as Free · 10 in-app purchase option(s). Senza: Keto & Fasting prices as Free. My Challenge: Diet Plans is marked for Water tracking. Senza: Keto & Fasting is not. Senza: Keto & Fasting is marked for Barcode scanner, Fasting. My Challenge: Diet Plans is not.
Price
My Challenge: Diet Plans: Free · 10 in-app purchase option(s).
Senza: Keto & Fasting: Free.
Monthly figure: My Challenge: Diet Plans $32.99, Senza: Keto & Fasting unknown.
Yearly figure: My Challenge: Diet Plans $59.99, Senza: Keto & Fasting unknown.
Features that differ
Barcode scanner: only Senza: Keto & Fasting is marked available.
Water tracking: only My Challenge: Diet Plans is marked available. Mentioned in the App Store description.
Fasting: only Senza: Keto & Fasting is marked available. Mentioned in the App Store description.
Fit
My Challenge: Diet Plans has no best-fit line.
Senza: Keto & Fasting has no best-fit line.
Where the scores differ
Pricing value: My Challenge: Diet Plans 6, Senza: Keto & Fasting 10. My Challenge: Diet Plans: 10 - annualised price $59.99/15 (+0.5 if free trial). Senza: Keto & Fasting: 10 - annualised price $0.00/15 (+0.5 if free trial).
Feature depth: My Challenge: Diet Plans 3.4, Senza: Keto & Fasting 2.3. My Challenge: Diet Plans: 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: My Challenge: Diet Plans 6.2, Senza: Keto & Fasting 9. My Challenge: Diet Plans: Bayesian rating 4.40 (iOS 4.50x4220 + Play 4.26x2779, 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: My Challenge: Diet Plans 9.4, Senza: Keto & Fasting 1.7. My Challenge: Diet Plans: Last release 3 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: My Challenge: Diet Plans 6.4, Senza: Keto & Fasting 6.8. My Challenge: Diet Plans: log10 of 6999 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 My Challenge: Diet Plans if you need Water tracking. Choose Senza: Keto & Fasting if you need Barcode scanner and Fasting.