Here are 10 smart -- and cheap -- uses for old phones.

 

 

Set your old phone on a dock or a stand and use a clock app. With Standard Time ($3.99), you will have a timepiece unlike any other.

 

With this app, your clock is a non-stop time lapse¹ video of construction workers switching out pieces of lumber² to shape the actual time. "It's mesmerizing," says Shawn Roberts, 47, an Oakland, California, marketing³ executive.

 

You can also set up flexible alarms and get the phone to play soothing⁴ white noise as you go to sleep. Set it close enough to the bed, and it can be a sleep tracker, too, with an app like SleepBot (free).

 

 

Take your music library on the road. Some cars come equipped with docking ports for iPhones and have dashboard screens so you can navigate⁵ your musical options hands-free. Or you can just use the cigarette lighter⁶ for power.

 

 

Televisions, speakers and other devices now have apps that allow users to make their iPhones into sleek⁷ remotes.

 

Carm Lyman, 42, of Napa, California, converted his iPhone 4 into a remote for his household sound system after his iPhone 5 arrived. Lyman can control the audio levels and activate⁸ speakers in various parts of his home as well as access different music services.

 

 

Apps can convert an old iPhone that has access to WiFi into a surveillance camera and motion detector⁹. Presence, which is a free app, provides a live stream from the area you want to monitor. You can set it up to record video clips when it detects motion, too.

 

If you buy a robotic viewing stand for about $100, you can move the camera 360 degrees rather than stick with a stationary¹¹ view.

 

 

No need to go through recipe books or hunt around for other devices when you have a kitchen iPhone. Download a cookbook app, such as My Recipe Book (99 cents) or Big Oven (free), and just leave the device on the kitchen counter. It takes up almost no space and will hold far more recipes than any book.

 

 

Need a place to store old photos and music or other files? Turn your old phone into a storage drive using a free app like USB & Wi-Fi Flash Drive.

 

 

Why buy a digital voice recorder when you have a retired¹² iPhone? Using any of several free apps, including Voice Recorder and Voice Record Pro¹⁰, you will have a designated memo¹³ recorder or a device to record interviews and speeches.

 

 

Genius Scan and Doc Scan are two apps that will turn an iPhone into a handy portable scanner that you can use for work, school reports, genealogical research, or recording¹⁴ receipts. And they will not cost you a penny.

 

For $20 and up, you can buy a stand that makes your iPhone into a stationary scanner.

 

 

Sure, you can spend $100 or more on a baby monitor, or you can just set your old iPhone up to watch streaming video of your baby as well as hear and even talk to him or her.

 

Cloud Baby Monitor ($3.99) also allows parents to receive the signal on a wireless¹⁵ network or on WiFi so they do not have to be within a certain number of feet of the monitor.

 

 

Whether you need to find your car if it is stolen, record where you have traveled, or spy on your teenage driver, the built-in GPS in your phone can be used as a tracking device. An app like InstaMapper ($2.99) lets you watch the vehicle in real-time and have a record of it.

 

Of course, you may end up taking the simple path of letting a child use your old iPhone as an iPod Touch. Keep in mind that the phone can still dial 911, even if it does not have cellular¹⁶ service, Smith said.

 

You can also use your old phone as a back-up in case your new model suffers irreparable harm. That said, the battery of a phone that sits in a drawer unused could drain to the point where it is no longer viable¹⁷.

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