So let’s parse this: While Twitter may have had a greater number of smartphone users visiting its site (via the mobile Web and via Twitter apps), Instagram’s users appear to be returning to the site on a more frequent basis, and spending longer on the site each time they return.
http://allthingsd.com/20120927/instagram-beats-twitter-in-daily-mobile-users-for-the-first-time-data-says/
Almost half (49%) of Instagram users are on the platform daily, with 32% who say they go on Instagram several times a day. Another 24% say they check in weekly, while 26% visit Instagram less often than that.
http://www.pewinternet.org/2015/01/09/frequency-of-social-media-use-2/
Facebook users are highly engaged with the platform. Fully 70% say they use Facebook daily (including 45% who do so several times a day), a significant increase from the 63% who visited daily in August 2013. Some 17% visit Facebook weekly, while 12% of users log on less often.
http://www.pewinternet.org/2015/01/09/frequency-of-social-media-use-2/
1 Social is now the top Internet activity: Americans spend more time on social media than any other major Internet activity, including email. 2  Social-mobile rules: 60% or so of social media time is spent not on desktop computers but on smartphones and tablets.
http://www.businessinsider.com/social-media-engagement-statistics-2013-12
Now the pressure is on Facebook to create mobile advertising products that effectively utilize what seems to be Instagram’s key strengths, according to comScore: Bringing users back more often on a daily basis, and keeping them engaged for a longer period of time compared to Twitter.
http://allthingsd.com/20120927/instagram-beats-twitter-in-daily-mobile-users-for-the-first-time-data-says/
Another 24% say they visit a few days a week, while 40% say they check Twitter less often. The proportion of Twitter users who visit the site daily is a significant decrease from the 46% of users who did so in August 2013.
http://www.pewinternet.org/2015/01/09/frequency-of-social-media-use-2/
That data comes from comScore, via a new mobile measurement report: It says that throughout August, Instagram had an average of 7.3 million daily active users — or DAUs, in Facebook parlance. That tops of Twitter’s 6.9 million DAUs over the same period of time. What’s more, the average Instagram user spent 257 minutes accessing the photo-sharing site via mobile device in August, the data claims, while the average Twitter user over the same period spent 170 minutes viewing.
http://allthingsd.com/20120927/instagram-beats-twitter-in-daily-mobile-users-for-the-first-time-data-says/
The proportion of LinkedIn users who visit the site weekly dropped from 34% in August 2013 to 25% in 2014. Likewise, 61% of LinkedIn users say they visit the site every few weeks or less often, compared with 52% who said so in 2013.
http://www.pewinternet.org/2015/01/09/frequency-of-social-media-use-2/
In full, the report: 1  Dives into the engagement numbers for established and emerging social networks, including statistics for time-spend, share of aggregate time-spend, and time-spend per-user. 2  Analyzes how mobile usage is the engine driving time-spend gains at social networks, which benefits Twitter.
http://www.businessinsider.com/social-media-engagement-statistics-2013-12
1 Snapchat is a smaller network than WhatsApp, but outpaces it in terms of time-spend per user. 2  Pinterest, Tumblr and LinkedIn made major successful pushes last year to increase engagement on their mobile sites and apps. 3  The new race in social media is not for audience per se, but for multi-device engagement.
http://www.businessinsider.com/social-media-engagement-statistics-2013-12
how long do instagram users spend per visit
Instagram users spend 257 minutes per visit.