If you are a developer with the APK's (Java/Kotlin or React Native/Flutter):
You may find websites like or Smartface that let you upload an APK and test it in a browser-based Android emulator. These are not converters . They run the APK in a cloud Android virtual machine, viewable via your iPhone’s web browser. The app is not installed on iOS; it’s streaming video of an Android session. apk to ipa converter online ios link
If you need a specific app that’s only on Android: If you are a developer with the APK's