Supported technologies

Pie tests your app through its interface, the way a user does, so the framework or backend behind it doesn’t limit what Pie can test.

Platforms

Platform	What you give Pie	Where tests run
Web, including progressive web apps	The URL	A browser session at the screen resolution you choose
iOS	An iOS simulator build: a `.app` zipped with `ditto`	iOS simulators
Android	An `.apk`	Android emulators

Mobile apps are native iOS and Android. .ipa and .aab files don’t work. To produce and upload a build, see Prepare mobile builds.

Choose one on the suite page, under How it runs. Add New Run shows the resolution of the suite you pick.

Pick an OS version, then a device. The default is iOS 18.2 on the default iPhone.

Setting	Options
OS version	iOS 27.0, iOS 26.5, iOS 26.0, iOS 18.5, iOS 18.4, iOS 18.2 (default), iOS 17.0, iOS 16.0
Device (simulator model)	iPhone (default), iPad (default), iPhone 14, iPhone 14 Pro, iPhone 15 Pro, iPhone 16 Pro, iPhone 17 Pro, iPad Pro 11" (M4)

The default is Android 14.

Pie doesn’t depend on how your app is built. Examples of stacks behind the apps it tests:

Area	Examples
Web frontends	React, Angular, Vue.js, Svelte
Mobile	Native iOS (Swift, Objective-C), native Android (Kotlin, Java), React Native
Backends	Node.js, Python, Java, Go, Ruby

For build preparation by framework, see Android, iOS native and React Native iOS.

Load and performance testing.
Security and penetration testing.
Real hardware behavior, because mobile tests run on simulators and emulators.
Flows that involve several users at once. Pie doesn’t discover them automatically.

Last updated on October 27, 2026