{"name":"Body Fat Percentage Calculator","short_name":"CalcMate","description":"Estimate body fat percentage using the US Navy circumference method (Hodgdon & Beckett, 1984) - ±3% margin vs. hydrostatic weighing. ACE body fat classification for men and women. Free, no data stored.","start_url":"/en/health/body-fat","display":"standalone","background_color":"#ffffff","theme_color":"#10b981","icons":[{"src":"/icons/web-app-manifest-192x192.png","sizes":"192x192","type":"image/png","purpose":"any maskable"},{"src":"/icons/web-app-manifest-512x512.png","sizes":"512x512","type":"image/png"}]}