iOS, Swift, and App Store terms, defined in plain English
Plain-English definitions of the words that show up when you build and ship an iOS app. Each entry opens with a one-line answer, then a short explanation and a real example.
Freemium vs subscription: what is the difference?Freemium vs subscription compares offering a free tier against charging recurring access. Here is how the two models differ and overlap for apps.Native app vs web app: what is the difference?A native app is built for a specific platform; a web app runs in a browser. Here is the difference between a native app and a web app.No-code vs low-code: what is the difference?No-code vs low-code compares two ways to build software: no-code uses visual tools only, low-code mixes visual tools with custom code.Swift Package Manager vs CocoaPodsSwift Package Manager vs CocoaPods: how the two iOS dependency managers differ, and which one to use for a new project today.SwiftUI vs UIKit: what is the difference?SwiftUI is Apple newer declarative UI framework; UIKit is the older imperative one. Here is the difference between SwiftUI and UIKit.What are App Clips?An App Clip is a lightweight piece of an iOS app that runs a single task without a full install. Here is what App Clips are and how they work.What are deep links?A deep link is a URL that opens an app directly to a specific screen. Here is how deep links work on iOS and how they differ from Universal Links.What are entitlements?Entitlements are key-value permissions that grant an iOS app access to protected capabilities like push notifications and iCloud. Here is how they work.What are Universal Links?Universal Links are https deep links that open content in your iOS app when installed and fall back to the web when not. Here is how they work.What is a bundle identifier?A bundle identifier is the unique reverse-domain string that names an iOS app to Apple systems. Here is what a bundle ID is and how it works.What is a distribution certificate?A distribution certificate is the Apple certificate that signs an iOS app for TestFlight and the App Store. Here is how it works.What is a hybrid app?A hybrid app is a mobile app built with web technologies and wrapped in a native shell so it installs from an app store. Here is how hybrid apps work.What is a native app?A native app is built for one platform with that platform tools and installed from an app store. Here is what a native app is and why it matters.What is a paywall?A paywall is the screen in an app that asks users to subscribe or pay to unlock features. Here is what a paywall is and how it works on iOS.What is a provisioning profile?A provisioning profile authorizes an iOS app to run on devices or ship to the App Store. Here is what a provisioning profile is and what it contains.What is a PWA (progressive web app)?A PWA is a web app that can be installed and work offline like a native app. Here is what a progressive web app is and its limits on iOS.What is an AI app builder?An AI app builder turns a plain-English description into working app code and screens. Here is what an AI app builder is and how it works.What is an App Privacy nutrition label?An App Privacy nutrition label is the App Store summary of the data an app collects and how it is used. Here is what it shows and who fills it out.What is an Apple Developer account?An Apple Developer account is the paid Apple Developer Program membership needed to publish iOS apps. Here is what it includes and what it costs.What is an auto-renewable subscription?An auto-renewable subscription is an in-app purchase that renews automatically until canceled. Here is how auto-renewable subscriptions work on iOS.What is an in-app purchase?An in-app purchase lets users buy digital content or features inside an iOS app through Apple system. Here is what in-app purchases are.What is an IPA file?An IPA file is the packaged, signed archive used to distribute and install an iOS app. Here is what is inside an IPA file and how it is used.What is an OpenAI API key?An OpenAI API key is a secret credential that authenticates and bills your requests to the OpenAI API. Here is what it is and how to keep it safe.What is an XCFramework?An XCFramework is an Apple bundle that packages a compiled library for multiple platforms and architectures. Here is what an XCFramework is.What is APNs (Apple Push Notification service)?APNs, the Apple Push Notification service, delivers push notifications to Apple devices. Here is what APNs is and how it works.What is App Store Connect?App Store Connect is Apple portal for managing, submitting, and tracking apps on the App Store. Here is what App Store Connect is and what it does.What is App Tracking Transparency?App Tracking Transparency (ATT) is Apple framework requiring apps to ask permission before tracking users across other apps. Here is how it works.What is churn rate?Churn rate is the percentage of users or subscribers who cancel over a period. Here is how churn rate is calculated and why it matters for apps.What is CocoaPods?CocoaPods is a dependency manager for Swift and Objective-C iOS projects. Here is what CocoaPods is, how it works, and its status today.What is code signing?Code signing proves an app comes from a verified developer and is unaltered. Here is what code signing is and why iOS requires it.What is cross-platform app development?Cross-platform app development builds one codebase that runs on iOS and Android. Here is what it is, with its tradeoffs against native.What is freemium?Freemium is a model that offers a product free and charges for premium features or higher limits. Here is how the freemium model works for apps.What is Info.plist?Info.plist is the property list file that stores an iOS app configuration and metadata, including version and privacy strings. Here is how it works.What is LTV (lifetime value)?LTV, or lifetime value, is the total revenue you expect from an average user over their lifetime. Here is how LTV is calculated for an app.What is MRR (Monthly Recurring Revenue)?MRR, or Monthly Recurring Revenue, is the predictable monthly revenue from active subscriptions. Here is how MRR is calculated and why it matters.What is no-code?No-code is a way to build software with visual tools instead of writing code, so non-developers can create apps and workflows. Here is how it works.What is prompt-to-app?Prompt-to-app is the workflow of turning a plain-English prompt into a working application. Here is what prompt-to-app means and how it works.What is StoreKit?StoreKit is Apple framework for in-app purchases, subscriptions, and App Store features. Here is what StoreKit does and how StoreKit 2 differs.What is Swift Package Manager?Swift Package Manager is Apple official tool for managing Swift code dependencies. Here is what Swift Package Manager is and how it works.What is Swift?Swift is Apple modern programming language for building apps across its platforms. Here is what Swift is and why iOS apps use it.What is SwiftUI?SwiftUI is Apple declarative framework for building user interfaces across Apple platforms. Here is what SwiftUI is and how it works.What is TestFlight?TestFlight is Apple service for inviting people to test a beta version of an iOS app before release. Here is what TestFlight is and how it works.What is the App Store review process?The App Store review process is Apple evaluation of every app before it goes live. Here is what App Store review is and how it works.What is the IDFA?The IDFA, or Identifier for Advertisers, is a per-device ID Apple uses for ad measurement. Here is what the IDFA is and how ATT changed it.What is the iOS Simulator?The iOS Simulator runs iPhone and iPad apps on your Mac without a physical device. Here is what the iOS Simulator is and how it works.What is vibe coding?Vibe coding is building software by describing what you want in plain English and letting an AI write the code. Here is what it means.What is Xcode?Xcode is Apple integrated development environment for building apps for its platforms. Here is what Xcode is and what it includes.
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