There is another app for onscripter games ,called "81App"
link to AppStore (https://apps.apple.com/us/app/81app-ons-series-software/id1459512942)
Document (https://github.com/CrazyPeter/81AppDocument/blob/master/README.md)
You could try APP named
"81App" : Support English, Chinese, Japanese, Korean
And you can get them on APP Store.
Document (https://github.com/CrazyPeter/81AppDocument/blob/master/README.md)