Life360 may help you make better route choices when heading out on Halloween thanks to its specific pinpoints of crime activity. There's also a premium option--$5 per month or $50 per year--that offers around-the-clock customer service, which includes help with location tracking and finding roadside assistance.
Cabin (free) is another solid, cross-platform friend-and-family locater. You can message others in your "cabin" (see what they did there?) directly from the app, which can be faster than creating a new group Message or SMS. You can also assign tasks, which is a great way to nag your children about getting home on time.
If you set up an account and designate yourself as the group admin, then you'll have access to additional features--you can delete users from the group or freeze their access to the in-app family.
You'll also get a little extra info when you look at someone's location, such as an exact calculation of how far away they are and an icon indicating their phone's battery level--so that "I'm sorry I didn't text you back, my phone died!" excuse just isn't going to fly anymore. You can pinch-to-zoom to hone in closer on their location and tap their icon to quickly send a message from Cabin.
If you don't want to sign up for another online account, but you do want to know where everyone is on Halloween, then go with Glympse (free).
It's perfect for one-time use, as anyone who grabs the app can share their whereabouts for a specified length of time--anywhere from four hours to 15 minutes. It then expires afterwards, which is good for sharing your location with a friend--or your child's friend's parent who you need to communicate with on Halloween, but don't want to have unlimited access to your child's location after that.
Glympse actually built a separate app specifically for Halloween night called Track n Treat (free). It's really just a streamlined version of Glympse that lets you quickly broadcast your location to others, but with a Halloween twist. Glympse also recommends you use the app to let your neighbors know that your kid is out and about, so they can help keep an eye out in case of an emergency.
Glow sticks are a Halloween tradition--there's nothing like a quirky neon light to cut through the darkness.
GlowStickGo (free) is a clever app that turns your iPhone into, well, a glow stick of sorts. You can shake your phone to get that blur of color you would with a real one--just be careful not to send it flying across the street.
The app gives you a few colors to play with, and includes in-app upgrades if you want the full rainbow of choices. (Might I suggest Flames, Plasma, Rainbow Shift, or Blacklight?)
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