After 'Supermom' Jogger's Kidnap Ordeal, How Your Smartphone Can Keep You Safe

In the wake of the kidnapping of Sherri Papini, fear among women jogging alone has many on edge, and there are new smartphone apps to help women protect themselves and stay safe.

Read: 'Supermom' Jogger Was Branded, Starved by Her Kidnappers in 3-Week Ordeal

The Lifeline Response app costs $5 a month. If you find yourself in a situation where you don't feel safe, put your thumb on the app's home screen. If your thumb comes off the sensor you get a call.

“This is lifeline response. We have received your emergency distress alert. I have notified the local police of the situation and transmitted your GPS coordinates. The police are currently en route to your location,” the message says.

Something else that Inside Edition found helpful is the Defense Alert Device.

When you buy the device and download the free app, it gives you a couple of features. If you're walking home from work and you feel uncomfortable, you can push a button to call police.

It also activates a pulsating light that can disorient your attacker. In addition, the app has a pepper spray feature and by pushing this button you alert contacts in your area that you’re in trouble and need help.

Another free app is called "The Companion.” It lets you designate any of your phone contacts as a "companion” like a co-worker or friend who can monitor your movements. If you suddenly feel unsafe, you can hit "I’m nervous" and the app will notify the friend to check on you.

Read: 'Supermom' Jogger's Husband Reveals Moment He Found Out She Was Alive: 'She Was Screaming'

Security expert Steve Kardian told Inside Edition: "The most important thing is to always be aware of your surroundings and never let anything replace your common sense and knowledge."

Watch: Important Running Safety Tips After Jogger Dies in Central Park Attack