Does anyone know of another coding app that might go more in depth about coding syntax, specifically HTML?

Answer 1

Html is only used to make the front end of any website alone html can't do much in coding app if you want to make app through web developement then first you should make front end with html and css here css for styling the structure of html then javascript and php is used to backend and server end programming then to make the database queries by using SQL then you can make your website then if you want to make app from that you can use web android view for that
https://www.sololearn.com/learn/1439/?ref=app
https://www.sololearn.com/discuss/617443/?ref=app
https://www.sololearn.com/discuss/636195/?ref=app
https://www.sololearn.com/discuss/595802/?ref=app
https://www.sololearn.com/discuss/790206/?ref=app

Answer 2

I don't know another app , but ther is alot at the app store .
May be this could help you .
🌟This is a free PDF for HTML5 i hope it helps ☺
https://books.goalkicker.com/HTML5Book/