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Liver fibrosis calculator for iOS

FIB-4 & Liver Fibrosis

FIB-4 Index, NAFLD Fibrosis Score, and APRI — three evidence-based non-invasive tools for liver fibrosis assessment. Fully offline, built for clinicians, students, and researchers.

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Calculators

FIB-4 Index

Sterling et al., Hepatology 2006. Uses age, AST, ALT, and platelet count. Cutoffs: <1.30 low, 1.30–2.67 indeterminate, >2.67 high risk of advanced fibrosis.

NAFLD Fibrosis Score

Angulo et al., Hepatology 2007. Seven-variable score for predicting advanced fibrosis in non-alcoholic fatty liver disease. Cutoffs: <−1.455 low, −1.455 to 0.676 indeterminate, >0.676 high.

APRI

Wai et al., Hepatology 2003. AST-to-Platelet Ratio Index. Simple, widely used for fibrosis and cirrhosis screening. Cutoffs: <0.5 low, 0.5–1.5 indeterminate, >1.5 high.

Risk Classification

All three scores display color-coded risk badges (Low / Indeterminate / High) with clinical cutoff reference tables and paper citations.

Risk Levels

Each calculator maps the result to a three-tier risk classification with color-coded indicators.

Low Risk Indeterminate High Risk

Privacy

FIB-4 & Liver Fibrosis works entirely offline. No account, no server, no analytics. All calculations happen on your device. Values you enter are never stored or transmitted.

9 UI languages: English, 简体中文, 繁體中文, Deutsch, Español, Français, 日本語, 한국어, Português.

Disclaimer

FIB-4 & Liver Fibrosis is intended for educational and reference use only. Results should not replace clinical judgment or professional medical advice.