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WeChat or Weixin in Chinese ( Chinese: 微信; pinyin: Wēixìn ( listen ⓘ); lit. 'micro-message') [a] is a Chinese instant messaging, social media, and mobile payment app developed by Tencent. First released in 2011, it became the world's largest standalone mobile app in 2018 [4] [5] with over 1 billion monthly active users.
WhatsApp's client application runs on mobile devices, and can be accessed from computers. The service requires a cellular mobile telephone number to sign up. In January 2018, WhatsApp released a standalone business app called WhatsApp Business which
Software as a service ( SaaS / sæs / [1]) is a form of cloud computing in which the provider offers the use of application software to a client and manages all the physical and software resources used by the application. [2] .
TikTok, whose mainland Chinese counterpart is Douyin, [a] [3] is a short-form video hosting service owned by Chinese internet company ByteDance. It hosts user-submitted videos, which can range in duration from three seconds to 60 minutes. [4] . It can be accessed with a smart phone app .
Android is a mobile operating system based on a modified version of the Linux kernel and other open-source software, designed primarily for touchscreen mobile devices such as smartphones and tablets.
Messenger, [11] also known as Facebook Messenger, is an American proprietary instant messaging app and platform developed by Meta Platforms.
Citizen is a mobile app that sends users location-based safety alerts in real time. It allows users to read updates about ongoing reports, broadcast live video, and leave comments. The app uses radio antennas installed in major cities to monitor 911