Frustration-free shopping is an app for iPhone and iPad that helps you optimize recurring, often annoying, purchases in everyday life. Unlike a shopping trip, the goal when buying everyday necessities is to avoid forgetting anything and buying as little as possible that you don't (yet) need – keyword: shelf life. That's why the app has a mechanism that calculates a kind of shelf life for each item, offering you suggestions for things you might want to consider again on your next shopping trip. The app evolved from a kind of "finger exercise in SwiftUI and SwiftData." It has proven surprisingly useful in practice. You can easily adapt and optimize it to your needs. Some people now ask: "Why does the app cost something?" Years of experience with young people have shown me that many are convinced: "If something costs nothing, then it's worth nothing!" But the app has significant utility, and: There's no subscription! There are no ads! Enjoy "almost frustration-free shopping." You can find detailed instructions and a description on the developers' website at https://gittywynand.de/Inhalte/FrustfreiEinkaufen/