IOS:

  * local and session storage seem to have a 5mb size limit. This could be absolutely confirmed but it does appear there is a serious limit to session storage and Googe suggests the limit applies to local storage as well
  * websql has either a 5mb or 50mb limit depending what where and what you read. It also is apparently a deprecated method?
  * sqlite apparently has [[http://www.sqlite.org/limits.html|almost no limits]]? There's a [[https://github.com/brodysoft/Cordova-SQLitePlugin|Cordova plugin]] for it.
  * it could be that writing separate files is the best way to go. Apple provides [[https://developer.apple.com/library/mac/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/FileSystemOverview/FileSystemOverview.html|some guidelines]] on where to put what files. I have read that people using the file system with PG have had their apps rejected by the Apple store but this may be inaccurate or have other circumstances.
  * \\