The buzz out there now is all about apps. Whether it’s for iPhone or Android, you can’t visit Yahoo.com or watch the local news without hearing all about the latest, greatest mobile app. Dedicated apps that users install from app stores have a lot of advantages and there are some out there we all can’t live without, but you can’t ignore the mobile web.

Two apps that are on most every smartphone user’s home screen are Twitter and Facebook. They’re two of the best designed apps out there and both have been in the top 25 free apps in the iTunes App Store consistently since launch. Knowing that you might think Facebook and Twitter users always take advantage of those great apps when they’re on the go, but the numbers say otherwise. Based on numbers aggregated by Luke Wroblewski, mobile usage of the top two social juggernauts continues to explode and much of it is on the mobile version of their websites:

  • 50% of the more than 500 million active Facebook users currently access Facebook through their mobile devices (250M) compared to 25% a year ago (100M out of 400M). 33% of Facebook posts are sent via mobile devices. (source)
  • Facebook’s top mobile client is m.facebook.com (Facebook’s mobile Web site) with 18% of total new Facebook posts. Android, iPhone, and Blackberry are next each with about 4% of total new Facebook posts. (source)
  • 50% of total active Twitter users are on multiple platforms (mobile) compared to 25% a year ago. 40% of all tweets are sent via mobile. (source)
  • Twitter’s top mobile client is m.twitter.com (Twitter’s mobile Web site) with 14% of total unique users. SMS is next with 8% of total unique users. Then Twitter for iPhone (8%) followed by Twitter for Blackberry (7%). (source)

For both sites, a much higher percentage of people are using the mobile website than any particular mobile app. On Twitter, even SMS is still ahead of the iPhone and Blackberry apps. Whether it’s because they’re on older phones or because they’re following links in an email or a search result (remember that links don’t open apps), it’s clear that just because you offer an app doesn’t mean your mobile web presence is any less important.