16 Apps and Websites Kids Are Heading to After Facebook

Kik Messenger is an app that lets kids text for free. It's fast and has no message limits, character limits, or fees if you only use the basic features. Because it's an app, the texts won't show up on your kid's phone's messaging service, and you're not charged for them (beyond standard data rates).

What parents need to know

• Stranger danger is an issue. Kik allows communication with strangers who share their Kik usernames to find people to chat with. The app allegedly has been used in high-profile crimes, including the murder of a 13-year-old girl and a child-pornography case. There's also a Kik community blog where users can submit photos of themselves and screenshots of messages (sometimes displaying users' full names) to contests.
• It's loaded with ads and in-app-purchases. Kik specializes in "promoted chats" — basically, conversations between brands and users. It also offers specially designed apps (accessible only through the main app), many of which offer products for sale.

WhatsApp lets users send text messages, audio messages, videos, and photos to one or many people with no message limits or fees.

What parents need to know

• It's for users 16 and over. Lots of younger teens seem to be using the app, but this age minimum has been set by WhatsApp.
• It can be pushy. After you sign up, it automatically connects you to all the people in your address book who also are using WhatsApp. It also encourages you to add friends who haven't signed up yet.

GroupMe is another app that doesn't charge fees or have limits for direct and group messages. Users can also send photos, videos, and calendar links.

What parents need to know

• It's for older teens. The embedded GIFs and emojis have some adult themes, like drinking and sexy images.
• Teens are always connected. Without fees or limits, teens can share and text to their heart's content, which may mean they rarely put the phone down.

Instagram lets users snap, edit, and share photos and 15-second videos, either publicly or with a private network of followers. It unites the most popular features of social media sites: sharing, seeing, and commenting on photos. It also lets you apply fun filters and effects to your photos, making them look high-quality and artistic.

What parents need to know

• Teens are on the lookout for "likes." Similar to the way they use Facebook, teens may measure the "success" of their photos — even their self-worth — by the number of likes or comments they receive. Posting a photo or video can be problematic if teens are posting to validate their popularity.
• Public photos are the default. Photos and videos shared on Instagram are public unless privacy settings are adjusted. Hashtags and location information can make photos even more visible to communities beyond a teen's followers if his or her account is public.
• Private messaging is now an option. Instagram Direct allows users to send "private messages" to up to 15 mutual friends. These pictures don't show up on their public feeds. Although there's nothing wrong with group chats, kids may be more likely to share inappropriate stuff with their inner circles.

Tumblr is like a cross between a blog and Twitter: It's a streaming scrapbook of text, photos, and/or videos and audio clips. Users create and follow short blogs, or "tumblogs," that can be seen by anyone online (if made public). Many teens have tumblogs for personal use: sharing photos, videos, musings, and things they find funny with their friends.

What parents need to know

• Porn is easy to find. This online hangout is hip and creative but sometimes raunchy. Pornographic images and videos and depictions of violence, self-harm, drug use, and offensive language are easily searchable.
• Privacy can be guarded but only through an awkward workaround. The first profile a member creates is public and viewable by anyone on the Internet. Members who desire full privacy have to create a second profile, which they're able to password-protect.
• Posts are often copied and shared. Reblogging on Tumblr is similar to re-tweeting: A post is reblogged from one tumblog to another. Many teens like — and, in fact, want — their posts reblogged. But do you really want your kids' words and photos on someone else's page?

Twitter is a microblogging tool that allows users to post brief, 140-character messages — called "tweets" — and follow other users' activities. It's not only for adults; teens like using it to share tidbits and keep up with news and celebrities.

What parents need to know

• Public tweets are the norm for teens. Though you can choose to keep your tweets private, most teens report having public accounts. Talk to your kids about what they post and how a post can spread far and fast.
• Updates appear immediately. Even though you can remove tweets, your followers can still read what you wrote until it's gone. This can get kids in trouble if they say something in the heat of the moment.

Live.ly – Live Video Streaming poses all of the same risks that all live streaming services do, so poor choices, oversharing, and chatting with strangers are all a part of the package.

What parents need to know

• It's associated with musical.ly – your music video community. Because of the parent app's popularity, this streamer is all the rage and Musers have a built-in account.
• Privacy, safety, and creepiness are concerns. Because teens are often broadcasting from their bedrooms to people they don't know, sometimes sharing phone numbers, and often performing for approval, there's the potential for trouble.

Burn Note is a messaging app that erases messages after a set period of time. Unlike many other apps of this sort, it limits itself to text messages; users cannot send pictures or video. That may reduce issues such as sexting — but words can hurt, too.

What parents need to know

• It allows kids to communicate covertly. To discourage copying and taking screenshots, a spotlight-like system that recipients direct with a finger (or the mouse) only reveals a portion of the message at a time.
• It may encourage risky sharing. The company claims that its "Multi-Device Deletion" system can delete a message from anywhere: the device it was sent from, the device it was sent to, and its own servers. But it's wise to be skeptical of this claim.
• You don't have to have the app to receive a Burn Note. Unlike other apps — for example, Snapchat — users can send a Burn Note to anyone, not only others who have the program.

Snapchat is a messaging app that lets users put a time limit on the pictures and videos they send before they disappear. Most teens use the app to share goofy or embarrassing photos without the risk of them going public. However, there are lots of opportunities to use it in other ways.

What parents need to know

• It's a myth that Snapchats go away forever. Data is data: Whenever an image is sent, it never truly goes away. (For example, the person on the receiving end can take a screenshot of the image before it disappears.) Snapchats can even be recovered. After a major hack in December 2013 and a settlement with the FTC, Snapchat has clarified its privacy policy, but teens should stay wary.
• It can make sexting seem OK. The seemingly risk-free messaging might encourage users to share pictures containing sexy images.

Whisper is a social "confessional" app that allows users to post whatever's on their minds, paired with an image. With all the emotions running through teens, anonymous outlets give them the freedom to share their feelings without fear of judgment.

What parents need to know

• Whispers are often sexual in nature. Some users use the app to try to hook up with people nearby, while others post "confessions" of desire. Lots of eye-catching, nearly nude pics accompany these shared secrets.
• Content can be dark. People normally don't confess sunshine and rainbows; common Whisper topics include insecurity, depression, substance abuse, and various lies told to employers and teachers.
• Although it's anonymous to start, it may not stay that way. The app encourages users to exchange personal information in the "Meet Up" section.

Yik Yak is a free social-networking app that lets users post brief, Twitter-like comments to the 500 geographically nearest Yik Yak users. Kids can find out opinions, secrets, rumors, and more. Plus, they'll get the bonus thrill of knowing all these have come from a 1.5-mile radius (maybe even from the kids at the desks in front of them!).

What parents need to know

• It reveals your location. By default, your exact location is shown unless you toggle location-sharing off. Each time you open the app, GPS updates your location.
• It's a mixed bag of trouble. This app has it all: cyberbullying, explicit sexual content, unintended location-sharing, and exposure to explicit information about drugs and alcohol.
• Some schools have banned access. Some teens have used the app to threaten others, causing school lockdowns and more. Its gossipy and sometimes cruel nature can be toxic to a high school environment, so administrators are cracking down

MeetMe: Chat and Meet New People — the name says it all. Although not marketed as a dating app, MeetMe does have a "Match" feature whereby users can "secretly admire" others, and its large user base means fast-paced communication and guaranteed attention.

What parents need to know

• It's an open network. Users can chat with whomever's online, as well as search locally, opening the door to potential trouble.
• Lots of details are required. First and last name, age, and ZIP code are requested at registration, or you can log in using a Facebook account. The app also asks permission to use location services on your teens' mobile devices, meaning they can find the closest matches wherever they go.

Tinder is a photo and messaging dating app for browsing pictures of potential matches within a certain-mile radius of the user's location. It's very popular with 20-somethings as a way to meet new people for casual or long-term relationships.

What parents need to know

• It's all about swipes. You swipe right to "like" a photo or left to "pass." If a person whose photo you "liked" swipes "like" on your photo, too, the app allows you to message each other. Meeting up (and possibly hooking up) is pretty much the goal.
• It's location-based. Geolocation means it's possible for teens to meet up with nearby people, which can be very dangerous.

The bottom line for most of these tools? If teens are using them respectfully, appropriately, and with a little parental guidance, they should be fine. Take inventory of your kids' apps and review the best practices.

TV editor Polly Conway and former Common Sense Education writer Kelly Schryver contributed to this article.