C/C++$-offline compiler for os

This is a great iPhone/iPad app that puts a C/C++ compiler on your mobile device to both learn and practice C/C++ programming. I am very happy with it for that environment. There is a problem with the iWatch app however, since the C manual does not work. It would be nice to be able to consult the C manual from my iWatch while in a setting where consultanting my iPhone would be inconvenient. Please fix this issue. Most of the C manual text is missing on the iWatch app and the small amount of text that does appear is in “blue” and not readable. Also, I have two Series 5 Apple watches each of a different size. I would like to have this app available and operational on both watches so that I can wear either watch and have access to this app; however, it will only operate properly on one of the Series 5 Apple watches at a time. I paid for the app, so why won't it function on both watches? Please fix this problem!!

Dear Developer, this is a great tool and I wrote a program that I run from Apple Watch. However can you please advise how to switch programs on Apple watch without having to change "Codes template" file? I want that to stay as is. I can't find another way to contact you so I am doing it here. Thanks!

I mostly was looking for an app that I could access through my Apple Watch to read up on C++ whenever I had a free minute at work. As someone still fairly new to coding, It’s very nice being able to study for brief periods just by looking down at my watch.