Originally it was required for the primary phone to keep an online connection to WhatsApp for linked devices to work, but now WhatsApp can run on linked devices without such requirement. Linked devices automatically log out after 14 days of inactivity on the primary phone. As of 2025, the software requires at least Android version 5.0 or iOS version 15.1 respectively. By default, it is set to disappear in 24 hours, but it can be set for a longer amount of time and can be restricted for viewing by other contacts in the Settings menu. Unlike messages in groups or private chats, channels are not end-to-end encrypted.

Platform support

In February 2015, WhatsApp implemented voice calling, which helped WhatsApp to attract a different segment of the user population. Previously the Android and Nokia Series 40 versions used an MD5-hashed, reversed-version of the phone’s IMEI as a password, while the iOS version used the phone’s Wi-Fi MAC address instead of the IMEI. WhatsApp uses a customized version of the open standard Extensible messaging and presence protocol (XMPP). In July 2025, WhatsApp stopped developing the Windows UWP-based app due to poor support and deprecation of the UWP framework by Microsoft. In 2023, WhatsApp replaced the Electron-based apps with native versions for their respective platforms. Previously the WhatsApp user’s handset had to be connected to the Internet for the browser application to function but as of an update in October 2021 (and integrated by default in WhatsApp as of April 2022) that is no longer the case.

• By default, it is set to disappear in 24 hours, but it can be set for a longer amount of time and can be restricted for viewing by other contacts in the Settings menu.
• This new encryption feature added an additional layer of protection to chat backups stored either on Apple iCloud or Google Drive.
• On November 29, 2021, an FBI document was uncovered by Rolling Stone, revealing that WhatsApp responds to warrants and subpoenas from law enforcement within minutes, providing user metadata to the authorities.
• In October 2020, Facebook announced the introduction of pricing tiers for services offered via the WhatsApp Business API, charged on a per-conversation basis.
• On February 19, 2014, one year after the venture capital financing round at a $1.5 billion valuation, Facebook, Inc. (now Meta Platforms) agreed to acquire the company for US$19 billion, its largest acquisition to date.

The new privacy policy would not apply within the EU, as it is illegal under the GDPR. On December 16, 2020, a claim that WhatsApp gave Google access to private messages was included in the anti-trust case against the latter. In its revelation via documents received from court, the group claimed that the lawsuit brought against the company by WhatsApp threatened to infringe on its clients’ “national security and foreign policy concerns”. For security purposes, since February 1, 2020, WhatsApp has been made unavailable on smartphones using legacy operating systems like Android 2.3.7 or older and iPhone iOS 8 or older that are no longer updated by their providers. The bug was discovered by Check Point in August 2019 and reported to WhatsApp.

App Functionality

Voice messages sent this way are deleted after the recipient listens to them the first time. Unlike their 32-person group calls, starting a voice chat does not call all group members directly; they instead receive a notification to join the voice chat. Voice calls between two accounts were added to the app in March and April 2015. Edited messages were tagged as “edited” to inform recipients that the content had been modified. In October 2018, the “Swipe to Reply” option was added to the Android beta version, 16 months after it was introduced for iOS.

GB Version 2025

WhatsApp is owned by Meta, whose main social media service Facebook has been blocked in China since 2009. A message that promises to allow access to their WhatsApp friends’ conversations, or their contact lists, has become the most popular hit against anyone who uses the application in Brazil. In April 2017, nearly 300 WhatsApp groups with about 250 members each were reportedly being used to mobilize stone-pelters in Jammu and Kashmir to disrupt security forces’ operations at encounter sites.

Later in September 2018, WhatsApp introduced group audio and video call features. According to the company, messages could be edited within a 15-minute window after being sent. In 2022, WhatsApp added the ability for users to turn off their online status.

WhatsApp Web

The Saudi Central Bank (SAMA) has prohibited local banks from using instant messaging applications like WhatsApp for customer communication. The organization reported a massive drop-off in traffic for the blocked services, though the country’s government made no official statements about the block. In August 2021, the digital rights organization Access Now reported that WhatsApp along with several other social media apps was being blocked in Zambia for the duration of the general election. The ban was prompted by concerns of US authorities potentially accessing user data for whats the legal drinking age in russia such apps because of the CLOUD Act. In December 2021, the Swiss army banned the use of WhatsApp and several other non-Swiss encrypted messaging services by army personnel.

• On November 14, 2016, WhatsApp added video calling for users using Android, iPhone, and Windows Phone devices.
• Privacy practices may vary based, for example, on the features you use or your age.
• WhatsApp Messenger is a freeware and cross-platform messaging and voice over IP (VoIP) service owned by Meta.
• In November 2023, WhatsApp also began rolling out support for sending login codes to a linked email address, rather than via SMS.
• The army recommended that all army personnel use Threema instead, as the service is based in Switzerland.

Messenger Plus for WhatsApp

This was implemented only on Samsung phones, with plans to expand to Android and iOS “soon”. Previously between March 2016 and May 2017, only limited file types categorised as images (JPG, PNG, GIF), videos (MP4, AVI), and documents (CSV, DOC/DOCX, PDF, PPT/PPTX, RTF, TXT, XLS/XLSX), were allowed to be shared for file attachments. In July 2017, WhatsApp added support for file uploads of all file types, with a limit of 100 MB.

Providing a bundle of these free of charge to users will work like a gateway drug of sorts – users who may be able to afford data services and phones these days just don’t see the point of why they would pay for those data services. WhatsApp (officially WhatsApp Messenger), owned by Meta Platforms, is an American social media, instant messaging (IM), and Voice over IP (VoIP) service accessible via desktop and mobile app. WhatsApp Messenger is a freeware and cross-platform messaging and voice over IP (VoIP) service owned by Meta. WhatsApp has increasingly drawn its innovation from competing services, such as a Telegram-inspired web version and features for groups. In May 2014, WhatsApp crossed 50 million monthly active users in India, which is also its largest country by the number of monthly active users, then 70 million in October 2014, making users in India 10% of WhatsApp’s total user base.

On February 28, 2019, The New York Times reported that Facebook was “hoping to succeed where Bitcoin failed” by developing an in-house cryptocurrency that would be incorporated into WhatsApp. The service became generally available in India and Brazil, and in Singapore for WhatsApp Business transactions only. WhatsApp Payments (marketed as WhatsApp Pay) is a peer-to-peer money transfer feature.

Version History

By February 2017, WhatsApp had over 1.2 billion users globally, reaching 1.5 billion monthly active users by the end of 2017. At that point WhatsApp was adding about 25 million new users every month, or 833,000 active users per day. In April 2017, the perpetrator of the Stockholm truck attack reportedly used WhatsApp to exchange messages with an ISIS supporter shortly before and after the incident.

The message reportedly contained a malicious file, the receipt of which resulted in Bezos’ phone being hacked. According to WhatsApp, the exploit “targeted at least 100 human-rights defenders, journalists and other members of civil society” among a total of 1,400 users in 20 countries. A Wired report noted the attack was able to inject malware via calls to the targeted phone, even if the user did not answer the call. In 2018, it was reported that around 500,000 National Health Service (NHS) staff used WhatsApp and other instant messaging systems at work and around 29,000 had faced disciplinary action for doing so.

India

In August 2022, WhatsApp launched an integration with JioMart, available only to users in India. The Cloud API enables businesses to integrate WhatsApp with other software, have a central WhatsApp account for multiple users and implement advanced automation. In May 2022, WhatsApp launched its Cloud API services (now known as WhatsApp Business Platform) for larger businesses requiring features beyond the WhatsApp Business App. In January 2021, WhatsApp announced a controversial new privacy policy allowing WhatsApp to share data with its parent company, Facebook. In April 2018, WhatsApp co-founder and CEO Jan Koum announced he would be leaving the company.

End-to-end encryption

In June 2009, when the app had been downloaded by only a handful of Fishman’s Russian-speaking friends, Apple launched push technology, allowing users to be pinged even when not using the app. The developer indicated that this app supports the following accessibility features. Originally users could only communicate with other users individually or in groups of individual users. The application runs from a mobile device though it is also accessible from desktop computers.

At the beginning of 2022, it was revealed that San Diego–based startup Boldend had developed tools to hack WhatsApp’s encryption, gaining access to user data, at some point since the startup’s inception in 2017. This new encryption feature added an additional layer of protection to chat backups stored either on Apple iCloud or Google Drive. The enforcement of the privacy policy was postponed from February 8 to May 15, 2021, WhatsApp announced they had no plans to limit the functionality of the app for those who did not approve the new terms. Previously, users could opt-out of such data sharing, but the new policy removed this option. In January 2021, WhatsApp announced an updated privacy policy which stated that WhatsApp would share user data with Facebook and its “family of companies” beginning February 2021. When a user deletes media for everyone, WhatsApp does not delete images saved in the iOS camera roll and so those users are able to keep the images.