Yes, HarmonyOS can install Android applications. HarmonyOS system is an operating system independently developed by Huawei, which is similar to Android operating system in essence, so some Android applications can also run directly on HarmonyOS system. However, some Android applications may need to be adjusted or modified to run on HarmonyOS. In addition, the app store on the HarmonyOS system currently mainly supports the internal components of applications, so it may not be possible to download and use the full versions of some Android applications.