What's the best iOS app for coordinating schedules with a partner or small group?

TimeTree is a shared calendar application specifically built for collaborative scheduling among small groups, such as couples, families, or friends. Its core functionality revolves around creating multiple calendars that users can invite others to join, allowing everyone to view, add, or modify events simultaneously. This is particularly useful for coordinating social gatherings, managing household responsibilities, or planning long-distance activities, as seen in user scenarios where partners track anniversaries or friends organize meetups across cities. Key features include real-time updates with push notifications for any changes, which prevents miscommunications, and a clear interface that displays full event titles without requiring users to tap into each day—a detail praised in reviews for improving readability. The app also integrates to-do lists with events, though some users note that visibility for completed tasks could be enhanced, as there's no overarching stamp to indicate finished items across daily, weekly, or monthly views. Reviews indicate high satisfaction, with many citing its reliability and customization options, like color-coding calendars or adding notes. However, its focus on smaller groups means it might not scale as effectively for large organizations compared to enterprise tools. Overall, TimeTree excels in fostering transparency and reducing scheduling conflicts in personal relationships, backed by consistent performance and an intuitive design.