title: Easiest way to create mbtiles files of Openstreetmap extracts?
body: <p>I'm creating an iPhone travel app that uses online as well as offline maps.  For the offline maps I want to allow users to download an mbtiles file of the area they are interested in (e.g. London).  The map should have information such as roads etc.. that are already found in OpenStreetmap. I'm aware of web sites such as <a href="http://metro.teczno.com/" rel="noreferrer">http://metro.teczno.com/</a> for downloading Openstreetmap extracts.  What is the easiest way to create mbtiles files of Openstreetmap extracts?  Note: no map customization is needed.   I've tried using TileMill, but I'm not able to see the correct map information.  Most information on this says to load quite a few other tools and the instructions are not easy to follow or they don't work and since I don't need map customization, it should not really be needed.  My main/preferred work environments are Windows, Mac and Ubuntu (using VirtualBox under Windows) in that order.  </p>
  
  <p>Thanks
  Tom</p>