‎WhatsApp Messenger App

Similarly to WhatsApp for web, Windows, Mac, and smartwatches, the iPad is a type of linked device that connects vegas casino apk and syncs to WhatsApp running on a smartphone. WhatsApp has been officially supported for iPads and its iPadOS since May 27, 2025. The Windows version is based on UWP while the Mac version is a port of the iOS version using Catalyst technology.

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.

When a user sends a message, it is stored on a WhatsApp server, which tries to forward it to the addressee, and repeatedly requests acknowledgement of receipt. WhatsApp’s voice codec is Opus, which uses the modified discrete cosine transform (MDCT) and linear predictive coding (LPC) audio compression algorithms. Some devices using dual SIMs may not be compatible with WhatsApp, though there are unofficial workarounds to install the app.

In March 2024, Meta announced that WhatsApp would let third-party messaging services enable interoperability with WhatsApp, a requirement of the EU’s Digital Markets Act (DMA). This led many users to delete WhatsApp and instead use services such as Signal and Telegram. In December 2019, WhatsApp announced that a new update would lock out any Apple users who had not updated to iOS 9 or higher and Samsung, Huawei, Sony and Google users who had not updated to version 4.0 by February 1, 2020. In August 2014, WhatsApp was the most popular messaging app in the world, with more than 600 million users.

• This would give them some context for why they are important, and that will lead them to pay for more services like this – or so the hope goes.
• Both airlines had previously launched customer services on the Facebook Messenger platform.
• In November 2024, the ability to transcribe voice messages was added, allowing users to read out what was said in a voice message, rather than listening to the audio.
• This lets users share videos of themselves more quickly, and without adding anything to their device’s gallery.

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.

Dual App – Duo Web Scanner

WhatsApp uses a “store and forward” mechanism for exchanging messages between two users. Multimedia messages are sent by uploading the image, audio or video to be sent to an HTTP server and then sending a link to the content along with its Base64 encoded thumbnail, if applicable. On November 14, 2016, WhatsApp added video calling for users using Android, iPhone, and Windows Phone devices. WhatsApp automatically compares all the phone numbers from the device’s address book with its central database of WhatsApp users to automatically add contacts to the user’s WhatsApp contact list. The desktop version was first only available to Android, BlackBerry, and Windows Phone users. WhatsApp Web is accessed through web.whatsapp.com and access is granted after the user scans their personal QR code through their mobile WhatsApp client.

Security and encryption

It was reported that US$3 million was spent in illegal concealed contributions related to this practice. After financial regulators in many regions raised concerns, Facebook stated that the currency, renamed Diem since December 2020, would require a government-issued ID for verification, and the wallet app would have fraud protection. This “Facebook coin” would reportedly be a stablecoin pegged to the value of a basket of different foreign currencies. The project reportedly involved more than 50 engineers under the direction of former PayPal president David A. Marcus. 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.

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. 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.

In 2023, WhatsApp replaced the Electron-based apps with native versions for their respective platforms. Similar to the WhatsApp Web format, the app, which synchronises with a user’s mobile device, is available for download on the website. 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. Linked devices allow the service to be used on multiple other platforms like desktop computers and smartwatches (e.g. WhatsApp Web, Facebook Portal), but also on other smartphones (called companions).

Data Not Linked to You

In 2022, WhatsApp added the ability for users to turn off their online status. 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.

A month earlier, after Koum purchased an iPhone, he and Acton decided to create an app for the App Store. In January 2018, WhatsApp released a standalone business app called WhatsApp Business which can communicate with the standard WhatsApp client. Privacy practices may vary, for example, based on the features you use or your age. The developer, WhatsApp Inc., indicated that the app’s privacy practices may include handling of data as described below.

Version 25.35.72

WhatsApp released a statement saying that “the feature is working properly”, and that images stored in the camera roll cannot be deleted due to Apple’s security layers. In September 2019, WhatsApp was criticized for its implementation of a ‘delete for everyone’ feature. In 2016, WhatsApp was widely praised for the addition of end-to-end encryption and earned a 6 out of 7 points on the Electronic Frontier Foundation’s “Secure Messaging Scorecard”.

Similar apps

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.

He also said that the app would not display any third-party ads, and that it would have new features such as the ability to communicate with businesses. In April 2015, Forbes predicted that between 2012 and 2018, the telecommunications industry would lose $386 billion because of “over-the-top” services like WhatsApp and Skype. This would give them some context for why they are important, and that will lead them to pay for more services like this – or so the hope goes. These could be a social networking service like Facebook, a messaging service, maybe search and other things like weather. The idea, he said, is to develop a group of basic internet services that would be free of charge to use – “a 911 for the internet”.

• However, the company did not reveal names of the end users, which according to a research by Citizen Lab include, Saudi Arabia, Bahrain, Kazakhstan, Morocco, Mexico and the United Arab Emirates.
• The idea, he said, is to develop a group of basic internet services that would be free of charge to use – “a 911 for the internet”.
• WhatsApp was criticized by security researchers and the Electronic Frontier Foundation for using backups that are not covered by end-to-end encryption and allow messages to be accessed by third-parties.
• 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.
• Now, the feature is also made available to iOS users, allowing them to link up to four iPhones.

In November 2025, WhatsApp announced that they would update their About feature, which allows users to add a short message to explain what they are doing. In December 2024, WhatsApp introduced a reverse image search feature, allowing users to verify image authenticity directly within the app using Google Search. The company also announced plans to implement reactions, the ability for administrators to delete messages in groups and voice calls up to 32 participants.

VoiceOver

By April 22, 2014, WhatsApp had over 500 million monthly active users, 700 million photos and 100 million videos were being shared daily, and the messaging system was handling more than 10 billion messages each day. When this multi-device feature was first introduced to Android and iOS users, it could only show messages for the last three months on the Web version, because the Web version was syncing with the phone. Similar to voice messages, this feature allows users to record and send short videos directly in a chat. This allows users to send messages between other messaging apps and WhatsApp while maintaining end-to-end encryption. In May 2017, it was reported that WhatsApp users spend over 340 million minutes on video calls each day on the app. In May 2016, some WhatsApp users were reported to have been tricked into downloading a third-party application called WhatsApp Gold, which was part of a scam that infected the users’ phones with malware.

In March 2012, WhatsApp improved its location-sharing function, allowing users to share not only their location, but also the location of places, such as restaurants or hotels. Visual effects also became available, adding visual filters to a user’s video feed. In December 2024, WhatsApp introduced several new video calling features, including the ability to select specific participants from a group to make a call, rather than calling all group members.

Later on, it also added support for iOS, Nokia Series 40, and Nokia S60 (Symbian). 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. Currently, WhatsApp’s principal platforms, which are fully supported, are devices supporting mobile telephony running Android, and iPhones. 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.

Both Telegram and Signal in particular were reported to get registration spikes during WhatsApp outages and controversies. In January 2020, WhatsApp reached over 5 billion installs on Google Play Store making it only the second non-Google app to achieve this milestone. According to the Financial Times, WhatsApp “has done to SMS on mobile phones what Skype did to international calling on landlines”. WhatsApp handled ten billion messages per day in August 2012, growing from two billion in April 2012, and one billion the previous October. In 2015, some third-party WhatsApp clients that were reverse-engineering the WhatsApp mobile app, received a cease and desist to stop activities that were violating WhatsApp legal terms. The army recommended that all army personnel use Threema instead, as the service is based in Switzerland.