According to a new report from comScore and Jumptap, soaring smartphone and tablet use has doubled the amount of time Americans spend online in the matter of a few short years. As a result, as of April of this year, smartphones (39% share) and tablets (12% share) account for approximately half of adults’ time online, a figure which rises to 59% among 18-24-year-olds and 61% among women aged 25-49. Total Internet Usage by Platform in Minutes (Billions)) Billion MinutesPlatformFeb 2010Feb 2013 Tablet - 115 Smartphone 63 308 Pc 388 467 Total minutes 451 890 Source: comScore Media Metrix, April 2013; Feb 2013 Mobile is estimated based on earliest observed comScore smartphone engagement data calibrated by number of smartphone users at that time. Smartphones alone account for 50% of online time for the two above-mentioned groups. Interestingly, while smartphones only account for a relatively small 25% of online time for Americans aged 50 and older, tablets grab 16% share, the highest among the age groups. The share of internet time represented by mobile devices differs greatly from one category to the next. For example, together they account for just 24% of time online with the automotive category and 32% of time spent with TV sites (an outsized 20% of which is on tablets). By contrast, two-thirds of social media time goes to smartphones and tablets, as does 82% of online gaming time and 92% of online radio time. Online Share of Minutes (by Content) Platform (% of Time Online)ContentSmartphoneTabletInternet Radio 77% 15% 8% Games 48 34 18 Technology 64 16 20 Social media 58 9 33 Weather 55 9 36 Retail 35 16 49 Lifestyles 32 18 50 Entertainment 39 11 50 Health 40 6 54 Food 28 17 55 Sports 31 7 62 News/information 31 7 62 TV 12 20 68 Business/finance 29 3 68 Automotive 16 8 76 Total Internet 39 12 49 Source: comScore Media Metrix, April 2013 The US “digital universe,” referring to the number of adults going online, is 194 million per month, according to the report. Of those, about 122 million use both a PC and a mobile device, while PC-only users number 58 million and mobile-only 14 million. Those figures are heavily influenced by older internet users. While 17-22% of internet users aged 18-49 are PC-only, that figure jumps to 48% of those aged 50 and older. While only 17% of online women aged 25-49 are PC-only, a greater proportion of online males of that age are so-called “screen jumpers” (mobile and PC users), at 74% share. That’s because a significant 14% share of women aged 25-49 are mobile-only. The Digital Universe (% of Audience) Total AudiencePeople 18-24Males 25-49Women 25-49People 50+ PC only 30% 22% 20% 17% 48% Screen jumpers PC+Mobile 63 65 74 69 51 Mobile only 7 13 6 14 1 Source: comScore Media Metrix, April 2013 To access the complete study, please visit Jumptap here.