I don’t personally use LaTeX on an iPad, but this article mentions Texpad. I don’t really use a lot of commercial applications, but Texpad is probably the best 25€ I have ever invested. It has a live preview mode, and unlike all other editors, live really does mean live: as soon as you type a character, it appears in the PDF preview. They have some sort of custom TeX engine to do that. It also has a very capable syntax completion (that will also complete any macros and things you define) and if you type a symbol like \varepsilon, the completion thingy has a little preview of whatever symbol you’re writing right now, which is utterly useful when you can’t remember if \epsilon or \varepsilon is what you want. I don’t know anything about their iOS app but if anyone needs a good LaTeX editor, be sure to check it out.
Not an iPad owner, but looking at their webpage, it seems they actually implement local/offline typesetting for the most common use-cases. Not sending my data to unknown online services is for me a game changer in any mobile application.
I think I’d rather share my data with a (UK) company than have to mess about debugging an iOS build of LaTeX without access to a console of any sorts? But the great thing about LaTeX is that there is no vendor lock-in, so we’re all free to use whatever is most practical!
Anyone have experience of doing this on Android?
Who needs LaTeX when LibreOffice runs native on your Java-based phone?
Someone who wants to use mathematical symbols withour being driven to the brink of suicide perhaps?