SWI Prolog for iOS

I think „J programming language“ is a good example for a well thought-out application for the iOS environment, considering the restrictions. It has an editing and an execute window with a simple mechanism for switching between them. 

It would be helpful if the glass keyboard had an additional row on top showing the characters frequently needed in PROLOG but normally hidden, like : ; - _  | ( )  [ ]  !. This additional row could include the keys needed for switching between the editing and the execute window.

For writing and storing code and for handling file transfer I prefer Textastic, an editor for the iOS and the OSX environment. Textastic supports Apple iCloud and offers syntax coloring schemata for a lot of languages, including  PROLOG.

Heinz Schild