Instagram is an ad-funded online service for parts of photographs and videos, which to Facebook belongs. Instagram is a mixture of microblog and audiovisual platform and enables photos to be shared on other social networks .
To use Apps for Windows 10 , Windows 10 Mobile , Android and iOS are available. Users can edit their photos and videos and add filters . Inspired by the Kodak Instamatic and Polaroid cameras, photos and videos taken with Instagram originally had a square shape.
The application was developed by Kevin Systrom and Mike Krieger , who created their HTML5- based check-in software burbn in San Francisco . They subsequently expanded burbn to photos and finally published Instagram on the App Store on October 6, 2010 .  On the server side, a number of proven open source solutions such as Ubuntu Linux, nginx – web server , Django and PostgreSQL with PostGISset. Instagram is hosted at Amazon Web Services .   Among the donors that went early in Instagram, include well-known Internet as investors Andreessen Horowitz and Sequoia Capital , as well as the Twitter -Mitgründer Jack Dorsey . [8th]
On April 3, 2012, Instagram also appeared for mobile devices with the Android operating system . 
In the same month, Facebook said it would take Instagram for a billion dollars (760 million euros). At that time, Instagram had twelve employees and no earnings model .   The announced purchase price of one billion dollars is far more than has ever been paid for the acquisition of a digital photo service. For example, Google Inc. acquired Picasa in 2004 for $ 5 million or Yahoo Flickr in 2005 for $ 30 million. When the News Corporation bought Photobucket for $ 300 million in 2007 , it was considered a record sum. Finally went in September 2012 about US $ 737 million to the Instagram-owners, of which 300 million in cash and 23 million Facebook shares; The reason for the lower total was the lower share price since the Facebook IPO in May 2012 (issue price approx. USD 38, price at the beginning of September 2012 approx. USD 19). 
Due to the takeover by Facebook, the short message service Twitter blocked the direct access to Instagram content through the Twitter API in July 2012. This made Instagram the second major platform after LinkedIn to be blocked by Twitter. 
At the beginning of November 2012, the so-called web profiles were activated. For the first time, these offer users of the service the opportunity to present their pictures publicly in the form of a personalized website . The function is assessed as an adaptation of Instagram to the structure and concept of Facebook. 
Instagram caused a sensation in December 2012 with the announcement of new, controversial data protection guidelines , which were partially reversed after protests by users. 
Since November 2013, Instagram has been available in a beta version for mobile phones with the Windows Phone operating system . There is no way to record and publish videos in this version.  For Windows 10 Mobile , a new version of the app was released in July 2016, which now supports almost all functions that are also available in the iOS and Android apps. Only the Instagram stories are missing in this version. 
On April 29, 2015, Instagram introduced a new music stream at @music . It presents photos, lyrics and videos by artists, musicians and fans from all over the world. It started with the Roots drummer Questlove .
In April 2017 it was announced that the Instagram app would receive an offline mode with almost all functions from the online version.
Version 2.0 was released in the App Store in September 2011 . It included some changes, such as Instant Tilt-Shift , four new filters, a higher resolution of the photos, optional frames, a new app icon and the live filters, which were abolished again in 2012.
In mid-August 2012, Instagram introduced version 3.0 of its app, which among other things introduces numerous innovations to the user interface. The biggest innovation was the introduction of a geotag function , through which the user can arrange his photos on a map that is also visible to other members of the platform.
From version 3.5, which was released in May 2013, it is possible to mark other people in his photos and to display photos on which you have been marked on your own profile. On June 20, 2013, posted on the Instagram blog that Instagram now square videos can be filmed with different filters.
In December 2013, Instagram Direct made it possible for users to send photos and videos only to individual users or a group of users.  The last revision of the web app was carried out in early September 2012. Since then, the mobile website has focused more on the scope of the iOS app, functionality and user interface have also been aligned with the classic web app.  As of December 2013 there are 19 selectable photo filters and 13 video filters.
Since iOS version 6.0, released on June 3, 2014, you can change the strength of the image filter. There is a new possibility of a vignette and the colors can be adjusted more. There were also other minor changes to photo editing. Uploading images and videos has also been made easier and follow-up recommendations have been made.
The new Stories function was introduced in August 2016 . Instagram Stories – similar to Snapchat – enables pictures and videos to be shared with friends and followers for 24 hours without these pictures appearing on the user’s Instagram profile. You can also add text and emojis to these images in advance and apply some filters to the images. 
Instagram TV ( IGTV ) was launched in June 2018 . With IGTV it is possible to upload videos with a running time of up to one hour. Instead of the conventional 16: 9 format, the 9:16 format is used.  Since June 28, 2018, the app has been able to add music from the Instagram music library to stories in selected countries.  You can watch the videos on Instagram TV without downloading the IGTV app. IGTV videos can be viewed via the regular Instagram app. For this purpose, a button has been integrated on the start screen of the app, which enables the user to go directly to the respective IGTV videos. On Instagram TV, users automatically see the IGTV posts from the channels they are already following.
In May 2018, Instagram introduced augmented reality filters that allow photos and videos to be provided with a virtual mask and effects with tracking and room detection technology. They are mainly used for face filters. Since August 2019, Facebook has published the Spark AR Studio tool for all users, with which it is possible to create your own AR filter.
Instagram announced in July 2011 that the limit of 100 million photos uploaded had been exceeded, in August it was 150 million. In December 2013, it said it was 16 billion, with an average of 55 million photos being uploaded every day. In August 2014, Instagram counted 20 billion images in total and 20 million new ones every day. According to the latest statistics from 2016, more than 40,000 photos and videos are uploaded every minute and thus almost 60 million posts every day.
The rapid growth of the platform was also due to the fact that numerous well-known brands started to maintain their own profile on Instagram at an early stage.
Since July 2016 there has been the option in the app to convert your own profile into a business profile (“business account”). Such an account gives you access to special statistics, you can create advertisements directly in the app and add contact options. Initially only in the United States and since 2015 also in Germany , advertising has now been placed between the entries in the form of photos or videos. These are tailored to the user and his preferences. Since mid-March 2018, German Instagram users have also been able to shop on the picture platform. So you can get prices and product information by tapping marked products on the pictures (visual shop window).
Since the professional accounts, Instagram has also been suitable for journalistic posts. The stories in particular can be used to create reports on events, advice or product tests as well as background reports.
Instawalk means a walk together , in which the users of Instagram collectively capture motifs and moments in their photos and provide this with appropriate hashtags . These often take place as part of a so-called InstaMeet . In the end, the photos and videos should be compiled from different perspectives and an exchange between the participants. In April 2014 there were almost 2,000 local Instagram groups.
With the data protection declaration introduced in December 2012 , Instagram allowed users to share user content and information, for example from cookies , device IDs , location or usage data of the parent company Facebook Inc. and their services. According to the company, this should serve to better integrate Instagram and Facebook. The fact that Instagram has granted itself extensive rights of use and exploitation of the uploaded images of its users was also viewed critically.Due to the ongoing public criticism, Instagram suspended the relevant passages a few days later and thus the terms and conditionslargely back to the old state.
As Instagram announced in March 2015, the order of photos that can be seen in a user’s timeline was changed by June 2016. Until then, the display was strictly chronological. Now an algorithm determines the order. The change in the order of the contributions was criticized many times. Many users asked their followers to turn on mail notifications to ensure they see updates.  Instagram responded with a tweet to the users, but did not change the algorithm. There is also no possibility to switch back individually to a chronological display of the contributions.
On December 27, 2018, Instagram released an update in which you could see the images by scrolling sideways instead of scrolling from top to bottom. After violent protests on the part of the users, the update was canceled after 30 minutes.
Furthermore, there is a messenger integrated in Instagram, which has a similar functionality to WhatsApp . Many critics are critical of the fact that encryption is not supported.