Already, about one in four U.S. consumers has a home personal assistant at their beck and call, thanks to the success of smart speakers like Amazon Echo and Google Nest.

But many users are just scratching the surface of what these gadgets can do.

If you aren’t familiar with the speakers (both starting at $35), you wake up your artificial intelligence-driven helper with a keyword – “Alexa” for Amazon devices and “OK, Google” for a Google Nest or Google Home speaker – followed by a question or command.

A human-like voice will give you a response, whether you want to hear the weather, a specific song, set a timer for the oven, or control your smart devices in your home, such as adjusting lighting or a thermostat.

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One-fourth of U.S. consumers (25%) will use a smart speaker in 2020, up from 17% in 2018, according to research firm eMarketer.

If you have a smart speaker already, don’t you want to get more out of it? Here are 10 helpful – and lesser-known – functions to take your digital assistant to the next level.

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Make free phone calls

Both Alexa and Google devices let you make free phone calls – even if you don’t own a landline. It uses the internet to place the outgoing call, using Voice over Internet Protocol or “VoIP” technology.

Just say “Alexa” or “OK, Google,” followed by a phone number (“dial 212-555-1212”), a name in your smartphone’s Contacts (e.g. “Call Mary Smith at work”) or a business name (“call the Home Depot at the corner of 1st and 3rd street.”)

It works for any 10-digit American or Canadian number!

‘OK, Google, remind me’

No pen or paper needed if you have an Amazon or Google speaker. Say something like “Alexa, remind me to pick up Maya from the mall at 4 p.m.” or “OK, Google, remind me to take my pills every day at 9:30 a.m.” When the time comes, you’ll be reminded by your speaker.