I have an iPhone 11 Pro Max is there any app or internet software that will turn my phone into a scale that can weigh out grams ounces pounds . All the ones I seen are not available

I have an iPhone 11 Pro Max is there any app or internet software that will turn my phone into a scale that can weigh out grams ounces pounds . All the ones I seen are not available . Or not being made . All the apps I downloaded needed my phone to have a special feature and iPhone 11 Pro Max doesn’t have it . So is there any software I can add to my phone or use with my phone to check weight ?