For doing database work in a separate thread, you used to be able to access WebSQL from a web worker on both iOS and Android, but sadly that's been dropped as o

For doing database work in a separate thread, you used to be able to access WebSQL from a web worker on both iOS and Android, but sadly that's been dropped as of Chrome 39 and iOS 9: https://github.com/pouchdb/pouchdb/issues/2806 https://github.com/pouchdb/pouchdb/issues/2806 Also I don't believe you can use the SQLite Plugin in a web worker either: https://github.com/litehelpers/Cordova-sqlite-storage/issues/105 https://github.com/litehelpers/Cordova-sqlite-storage/issues... Luckily, you can still access IndexedDB from a web worker on both platforms (if you are able to use Safari's partial implementation). Also depending on what kind of work you're doing in the database, most of the action happens at the native level rather than the (DOM-blocking) JS level.