Are there other viral apps like Facebook?

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Some examples of viral apps like Facebook are:

1. **Instagram**: It is a popular photo and video sharing app, which allows sharing comments, likes and updates through Facebook.

2. **Twitter**: It is an online social networking website and app, which allows sharing of comments and updates in text, image, video, audio and other media formats.

3. **TikTok**: It is a video sharing app, which allows users to create and share videos and helps increase contacts.

4. **Snapchat**: It is a face to face chat, photo and video sending app. It provides camera filters, stickers and other fun moods.

5. **WhatsApp**: It is a popular mobile app for sharing text, voice messages, videos and images.

These apps are defining their social lives with thousands of users sharing comments, posts, images and videos with them every day.