In August, some 7.3 million people pulled up Instagram on their phones every day, compared to only 6.9 million who opened Twitter’s mobile platform religiously, according to data released by comScore, a digital market research firm. What’s more, fans of Instagram, which lets users snap, edit and share photos, spent almost 4½ hours using the app in August, compared with just under three hours for serial tweeters, who blast out short messages to “followers.”
Twitter still has more smartphone users, but not as many log in daily. The social media start-up had 29 million unique mobile visitors last month, compared with 22 million who used Instagram. Twitter also has almost 300 million total visitors — including those logging in from desktop computers — while Instagram is only on phones.