Microsoft timed the Cortana app to stop working on Android and iOS, as it was March 31, its last day in the app stores, and all your information on the app, such as lists and reminders, will not be accessible from the mobile platform anymore, however, the voice assistant app will continue The company is at work on Windows 10, where you can retrieve lists of users.
According to the Indian site TOI, Microsoft decided to abandon the Cortana application earlier, in July 2020, and the company then said that it wanted to shift the focus of the AI voice assistant to Microsoft 365 services, and there were fully competent voice assistant competitors on both the Android and iOS platforms. In the form of Google Assistant and Apple Siri.
While Google Assistant is the go-to voice Assistant app for Android users, Apple users generally prefer Siri for all voice playback functions, and as such, Cortana as a mobile app faced some stiff competition from both.
Then there is Amazon Alexa, which must also be dealt with on the mobile platform, and given its poor reception on the mobile platform, it was only a matter of time before Microsoft started thinking about an alternative or abandoning the app altogether, and the Cortana mobile app was launched in 2018.