What's a solid Android app for staying on top of emails and scheduling while I'm running between clients?

Okay, so as a fitness instructor in LA, my schedule is insane. Microsoft Outlook has seriously streamlined my life. I can juggle client bookings, sync it with my Google Calendar for class schedules, and still have time to respond to emails between sets. The mobile notifications are clutch – I can triage messages quickly and archive the junk. Plus, it integrates with other fitness apps for sharing progress updates with clients and tracking my own training. I love that it reminds me to hydrate with customizable reminders. It's a solid performer, gets you moving without being preachy, and keeps me accountable. It's a must-have for anyone serious about optimizing their day.