A calculator app doesn't need that many megabytes of code and assets to be a calculator app. So if an app is way bigger than it should be, it usually means one

A calculator app doesn't need that many megabytes of code and assets to be a calculator app. So if an app is way bigger than it should be, it usually means one of two things (usually!): 1. The app was not very optimised, perhaps created by a novice, containing a lot of things it doesn't need. 2. The app used to be really small, but a lot of extra code was added to serve you ads, profile you for better targeting or do sneaky stuff you didn't ask for.