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| Original author(s) | Kevin Systrom, Mike Krieger (Burbn, Inc.) | ||||||||
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| Initial release | October 6, 2010 | ||||||||
| Stable release(s) [±] | |||||||||
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| Preview release(s) [±] | |||||||||
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| Development status | Active | ||||||||
| Operating system | iOS, Android, Windows 10 Mobile, Windows 10 | ||||||||
| Size | 139.4 MB (iOS), 32.34 MB (Android) | ||||||||
| Available in | 36 languages | ||||||||
| Type | Photo | ||||||||
| License | Proprietary Freeware | ||||||||
| Alexa rank |  17 (Global, January 2018) | ||||||||
Instagram is a mobile, desktop, and Internet-based photo-sharing application and service that allows users to share pictures and videos either publicly, or privately to pre-approved followers. It was created by Kevin Systrom and Mike Krieger, and launched in October 2010. It was acquired by Facebook in 2012.
Instagram lets registered users upload photos or videos to the service. Users can apply various digital filters to their images, and add locations through geotags. They can add hashtags to their posts, linking the photos up to other content on Instagram featuring the same subject or overall topic. Users can connect their Instagram account to other social media profiles, enabling them to share photos to those profiles as well. Originally, a distinctive feature of Instagram was its confining of photos to a square; this was changed in August 2015, when an update started allowing users to upload media at full size. In June 2012, an "Explore" tab was introduced, showing users a variety of media, including popular photos and photos taken at nearby locations, trending tags and places, channels for recommended videos, and curated content. Support for videos was originally launched in June 2013, and had a 15-second maximum duration and limited quality, with Instagram later adding support for widescreen and longer videos. Private messaging, called Instagram Direct, was launched with basic photo-sharing functionality in December 2013, and has gradually received major updates incorporating more features, most notably text support and "disappearing" photos. In August 2016, Instagram introduced a "Stories" feature, letting users add photos to a 24-hour temporary story, with subsequent updates adding virtual stickers and augmented reality objects.
After its launch in 2010, Instagram rapidly gained popularity, with one million registered users in two months, 10 million in a year, and ultimately 800 million as of September 2017. Its users had uploaded over 40 billion photos to the service as of October 2015. As of April 2017, Instagram Direct has 375 million active users, while, as of June 2017, the Instagram Stories functionality has over 250 million active users. The popularity of Instagram has resulted in widespread community engagement, including dedicated "trends", in which users post specific types of photos on specific days of the week with a hashtag representing a common theme. Instagram has received positive reviews for its iOS app, and it has been named "one of the most influential social networks in the world". However, the company has been the subject of criticism, most notably for policy and interface changes, allegations of censorship, and illegal or improper content uploaded by users.
Instagram was initially a free mobile app exclusively for the iOS operating system. A version for Android devices was released two years later, in April 2012, followed by a feature-limited website interface in November 2012, and apps for Windows 10 Mobile and Windows 10 in April 2016 and October 2016 respectively.
History
Instagram began development in San Francisco, when Kevin Systrom and Mike Krieger chose to focus their multi-featured HTML5 check-in project, Burbn, on mobile photography. As Krieger reasoned, Burbn became too similar to Foursquare, and both realized that it had gone too far. Burbn was then pivoted to become more focused on photo-sharing. The word Instagram is a portmanteau of instant camera and telegram.
Explore
In June 2012, Instagram introduced "Explore", a tab inside the app that displays popular photos, photos taken at nearby locations, and search. The tab was updated in June 2015 to feature trending tags and places, curated content, and the ability to search for locations. In April 2016, Instagram added a "Videos You Might Like" channel to the tab, followed by an "Events" channel in August, featuring videos from concerts, sports games, and other live events, followed by the addition of Instagram Stories in October.The tab was later expanded again in November 2016 after Instagram Live launched to display an algorithmically-curated page of the "best" Instagram Live videos currently airing. In May 2017, Instagram once again updated the Explore tab to promote public Stories content from nearby places.
Users
Following the release in October, Instagram had one million registered users in December 2010.[ In June 2011, it announced that it had 5 million users, which increased to 10 million in September. This growth continued to 30 million users in April 2012 80 million in July 2012,100 million in February 2013, 130 million in June 2013, 150 million in September 2013,300 million in December 2014, 400 million in September 2015, 500 million in June 2016, 600 million in December 2016, 700 million in April 2017, and 800 million in September 2017.
In October 2016, Instagram Stories reached 100 million active users, two months after launch. This increased to 150 million in January 2017, 200 million in April, surpassing Snapchat's user growth, and 250 million active users in June 2017.
In April 2017, Instagram Direct had 375 million monthly users.
In June 2011, Instagram passed 100 million photos uploaded to the service. This grew to 150 million in August 2011, and by June 2013, there were over 16 billion photos on the service. In October 2015, there existed over 40 billion photos.
On August 9, 2012, English musician Ellie Goulding released a new music video for her song "Anything Could Happen." The video only contained fan-submitted Instagram photographs that used various filters to represent words or lyrics from the song, and over 1,200 different photographs were submitted.
Instagram was listed among Time's "50 Best Android Applications for 2013" list.
Instagram has 20 million users in Iran.
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