What testing tools have you used? For web and mobile?

For web testing, I often use Selenium WebDriver — it allows automating browsers and supports many programming languages. I also use Cypress for more modern and faster frontend tests.

For mobile applications — Appium, which works with iOS and Android and uses the WebDriver protocol. Sometimes I use Espresso for Android and XCUITest for iOS when I need to write more low-level tests.

Additionally, for API testing, I use Postman and REST-assured.