Appium parallel tests Tutorial Pages:
http://www.swtestacademy.com/appium-tutorial/
https://www.swtestacademy.com/appium-parallel-tests-on-multiple-emulators/
http://www.swtestacademy.com/appium-parallel-tests/
https://www.swtestacademy.com/appium-cucumber-parallel-test-execution/
https://www.swtestacademy.com/appium-mobile-actions-swipe-tap-press/
Please check the branches.