Our company has had a fantastic experience with TrackingTime. We would recommend to anyone looking for an easy to use time tracking experience.
Microsoft Planner Time Tracking
Track time in Microsoft Planner and sync your projects automatically
Connect Microsoft Planner with TrackingTime in the way that best fits your workflow. Track time from within Microsoft Planner using our browser extension, or sync your Microsoft Planner projects automatically into TrackingTime to keep your workspace aligned — two different integration methods designed for different needs.
About microsoft planner
Microsoft Planner lets you easily bring together teams, tasks, documents, and conversations for better results. FEATURES Easy to use - Launch Planner from the Office 365 app launcher with a single click. You can then create a new plan, build a team, assign tasks, and update status—in a few easy steps. Organize work visually - Each plan has its own board, where you can organize tasks into buckets. You can categorize tasks based on their status or on whom they’re assigned to. To update the status or change assignments, just drag and drop tasks between columns.
https://tasks.office.com/