Plenty of mobile apps out there make Halloween more creepy and more fun.
For those who want to take the selfie portrait to the next level, there's ZombieBooth: 3D Zombifier, which transforms a head shot of the living into that of a zombie and turns photos into 3-D animations.
Be careful when using your finger on the touch screen, because they may try to bite.
Portraits can be saved and shared on social media sites.
There's also a VampireBooth app.
ZombieBooth is rated for ages 12+ because of frequent use of horror images. It works with iPad2, fourth-generation iPod Touch and camera-equipped iPhones.
There's a free version of ZombieBooth for Android and iOS and an ad-free version on iTunes with 50 additional zombie effects for $2.99.
Ghost Radar attempts to detect and record paranormal activity in the user's vicinity. It records audio, graphics and radar data, but it comes with a disclaimer that it's designed "for entertainment purposes" only.
The user comments are pretty scary, though. People claim to have recorded words and messages that connect to something in their life.
Ghost Radar Legacy (99 cents) is available for iPad/iPhone and Android devices. Ghost Radar: Connect is an enhanced version with extra features for $1.99 A free version is available for Android and Windows Phone.
Another ghost-buster tool for Android users is the Entity Sensor Pro EMF-Detector ($5.95). It claims to track paranormal activity using the phone's electro-magnetic field sensor to detect magnetic field activity and to record electronic voice phenomena.
House of Horrors delivers a collection of more than 100 horror movies to mobile device screens. Movies -- including "Night of the Living Dead" -- are listed by title and categorized by leading actor and director.
It's available for Android (99 cents), iPhone (99 cents), iPad ($1.99) and Windows Phone 7 (99 cents.)
The app iSoundGrid delivers a library full of scary sound effects to mobile devices -- owls, werewolves, chainsaws, thunder, howling wolves, screams and more. Use it to perk up that Halloween party or scare the little trick-or-treaters.
It is free for iPhone, $1.99 for iPad.
For younger app users who scary easily, Create A Monster HD lets kids design their own colorful monster portraits using a menu of different head shapes, eyes, ears and other elements. The portraits can be saved or shared on Facebook and Twitter.
It's recommended by Common Sense Media, which rates apps and digital media content for suitability for different ages. Common Sense gives this one an age 4+ rating.
Create A Monster (99 cents) is available for iPad.
Adrian McCoy: firstname.lastname@example.org or 412-263-1865.