Microsoft To-Do is a free productivity app that allows you to manage your to-do list and synch it between the web, iOS, Android, and Windows devices. The app was recently updated on Windows 10 with the star feature and today a new update is rolling out to Android and iOS versions with similar changes. Android users also get an extra feature called Routine Reminders that will remind you to get tasks done on your To-do lists. The official change log for this mobile update is listed below.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-to-do-for-android-and-ios-updated-with-new-features/