Hello!
1) "//run your code here" means call your service to retrieve new data http://docs.appery.io/documentation/u...
2) "older operating systems running the app in a browser seem to fail at login" - there is a problem in android 2.x native browser - requests to DB don't work on in Android 2.x native browser, this is Android issue, but we're searching for workaround.
3) "call on the native camera service in the safari browser" - to work with camera you have to compile .ipa file and install app on device
4) "on iOS7 the pictures do not list horizontally as they should" - iOS7 is not supported yet, but we're working on it. Try to use CSS.