fastlane

fastlane is an open source toolkit that automates the build, signing, testing and release steps for Android and iOS apps. Each task is written as a lane, which is a repeatable script the team can run again and again.

fastlane can capture localized app store screenshots for each language and device, and store the setup so anyone on the team can run it. It distributes beta builds to testers, including services such as TestFlight and Google Play, and it can increase build numbers and set changelogs. For release, it uploads builds and metadata, then submits them for review. iOS code signing identities can be kept in an encrypted git repository shared by the team.

• Generate localized app store screenshots
• Upload betas to TestFlight and other services
• Publish store releases from a script
• Store iOS signing identities in an encrypted git repo

Mobile developers, release engineers and small teams that want to stop doing store uploads by hand. It is useful for any project that ships updates often.

fastlane is open source under the MIT license, according to its repository. It is a command line tool, so it runs on a computer with the right build tools installed. Some steps depend on the store accounts and services you connect, so setup needs care.