Personal Appointment Scheduler App

I need a simple, reliable tool that lets me schedule my personal appointments and make sure I never miss one. The core focus is on creating, editing, and tracking appointments—no contact-management module is necessary.

Absolute must-have
• Built-in reminders and alerts that I can set at custom intervals (push, email, or on-screen pop-ups; whichever is easiest to implement).

Nice-to-have (not required right now)
• The option to hook into Google Calendar, Outlook, or similar services later on, as long as the architecture leaves room for it.

Deliverables
1. A working web or mobile application with a clean interface for adding, viewing, and deleting personal appointments.
2. Reminder system thoroughly tested so alerts fire at the right times.
3. Short setup guide or README explaining how to deploy and configure the tool.

I’m flexible on tech stack—JavaScript (React, Vue), Flutter, or even a lightweight PHP backend are all fine—so choose whatever allows you to deliver a smooth user experience and dependable notifications.