fastlane vs Gradle

fastlane is a free, open-source platform for automating iOS and Android app development and release workflows. Teams define workflows as lanes and can run them with a single command. A lane can manage build numbering, code signing, builds, beta uploads and changelog creation; fastlane also supports store releases, including metadata and screenshot management and submission for review. It can create localized app store screenshots for the languages and devices an app supports. The site lists support for more than 15 beta testing services, including TestFlight, Crashlytics Beta, Play and Hockey. Documentation describes integrations with more than 400 tools and services, including major CI systems, alongside community-built actions and plugins. For iOS signing, signing identities and profiles can be kept in a private encrypted Git repository and synced between machines. fastlane runs on a user's machine or server, and its documentation says credentials and other sensitive information stay there. macOS is officially supported; Linux and Windows are partially supported. The project uses the MIT license.

Gradle Build Tool is a free, open-source system for automating software builds across projects of different types and sizes. Build logic can use either Kotlin DSL or Groovy DSL. Incremental builds, caching and parallel task execution support the build process, while Gradle downloads and manages transitive dependencies from Maven- and Ivy-compatible repositories. The Gradle Wrapper can provision a build environment and specify the Gradle version used by a project. Its ecosystem covers JVM, Android, C/C++, Swift, Objective-C and assembler projects, and it runs on Windows, macOS and Linux. The Tooling API lets IDEs and other tools inspect projects, run builds, receive progress events and cancel operations. Listed support includes Android Studio and Ant, plus Checkstyle, CodeNarc, PMD and JaCoCo. Gradle includes dependency verification. The maker says open-source security fixes are limited by its end-of-life policy; its Security Subscription offers prioritized fixes under SLA and extended maintenance, but does not guarantee a clean scanner report when findings come from third-party libraries.