Here is an overview of some of the most used apps in the world—WhatsApp, YouTube, Airbnb, TikTok, and Zoom—focusing on their use cases and daily user numbers.



Whatsapp logo. Whatsapp social media icon. 31737239 PNG


Use Case: WhatsApp is a messaging app that allows users to send text messages, voice messages, images, videos, documents, and make voice and video calls. It is popular for personal communication, group chats, and business interactions due to its end-to-end encryption, ensuring secure communication.


Daily Users: WhatsApp boasts over 2 billion monthly active users, with a significant portion using the app daily. Estimates suggest that the app has around 500 million daily active users globally​​.





Use Case: YouTube is a video-sharing platform where users can upload, view, and share videos. It is used for entertainment, education, news, and content creation. YouTube serves a diverse range of content including music videos, tutorials, vlogs, and live streams.


Daily Users: YouTube has more than 2.5 billion monthly active users, with about 122 million daily active users who consume over a billion hours of video content each day​​.





Use Case: Airbnb is an online marketplace for lodging, primarily homestays for vacation rentals, and tourism activities. It connects hosts who want to rent out their homes with travelers looking for accommodations. Airbnb is used for booking unique travel experiences, both short-term and long-term stays.


Daily Users: Airbnb sees millions of users interacting with its platform regularly, although specific daily active user numbers are not always publicly disclosed. In 2022, Airbnb reported having over 150 million users who book stays and experiences on the platform annually​​.






Use Case: TikTok is a social media app for creating and sharing short-form videos, ranging from 15 seconds to 3 minutes. It is widely used for entertainment, challenges, music, dance, and viral content. The app’s algorithm provides personalized content feeds, keeping users engaged.


Daily Users: TikTok has approximately 1.58 billion monthly active users, with about 50 million daily active users in the U.S. alone. Globally, TikTok has around 1 billion daily active users who spend a significant amount of time on the app​.






Use Case: Zoom is a video conferencing app used for virtual meetings, webinars, and online collaboration. It became especially popular during the COVID-19 pandemic for remote work, online education, and virtual events. Zoom supports features like screen sharing, breakout rooms, and recorded sessions.


Daily Users: Zoom has about 2 million daily users worldwide. It is widely used by businesses, educational institutions, and individuals for various virtual communication needs​​.



These apps have become integral to modern digital life, each serving unique purposes from communication and entertainment to travel and professional collaboration.