It's actually possible to create a reminder using your desktop Web browser. (This assumes, of course, that you're signed into a Google account and already use Google Now on your phone.) Here's how: ...

You can add reminders to your Google Calendar to avoid forgetting certain events or tasks. Here's how to do it on desktop or mobile.

To add a reminder by hand, launch Google Now and scroll to the bottom where you'll find the menu icon and tap on it. Select "Set Reminder" from the list of options.