fastlane vs Nx

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.

Nx is a build system for JavaScript and TypeScript monorepos, with plugins that can extend its work to other languages. It builds project and task graphs, follows task dependencies, and runs work in parallel where possible. Nx Core provides local caching; Nx Cloud adds a remote cache shared by teams and CI, and can distribute tasks across Nx Agents according to CPU and memory use. Plugins can infer tasks, generate or alter code, update dependencies, and provide executors. Documented integrations include Angular, React, Vue, Node.js, Java, .NET, Vite, Webpack, Rspack, Jest, Cypress, and Playwright. Nx also provides CI workflow setup for GitHub, CircleCI, GitLab, Azure Pipelines, Jenkins, and Bitbucket Pipelines. Nx Cloud describes trusted-branch cache writes, artifact traceability, and invalidation of artifacts made with revoked tokens. API communications are encrypted in transit, and task artifacts can be encrypted end to end before remote caching. Hobby is free forever, with monthly credits, contributor and CI-connection limits; Team is $29/month, with additional listed charges for usage, contributors, and connections.