That's not quite it... There are programming languages in the App Store. A couple I've tried are: - LuaBox Pro https://itunes.apple.com/au/app/iluabox-pro/id43

That's not quite it... There are programming languages in the App Store. A couple I've tried are: - LuaBox Pro https://itunes.apple.com/au/app/iluabox-pro/id437557082?mt=8 https://itunes.apple.com/au/app/iluabox-pro/id437557082?mt=8 - Lisping https://itunes.apple.com/au/app/lisping/id512138518?mt=8 https://itunes.apple.com/au/app/lisping/id512138518?mt=8 - Ruby for iOS https://itunes.apple.com/au/app/ruby-for-ios/id535080197?mt=8 https://itunes.apple.com/au/app/ruby-for-ios/id535080197?mt=... The sticking point is that they can't download substantial new functionality. So you can't make it easy to import scripts from elsewhere to be run as is they were native apps. This is probably to avoid 'trojan horse' apps which appear to be a REPL but are really meant to be bit torrent clients or bitcoin wallets or ... anything else Apple wouldn't let in the front door.