I don't see TeXPad mentioned anywhere. An iOS LaTeX environment, featured here a few years ago: https://www.texpad.com/blog/latex-ported-to-ipad
But, unlike its MacOS version, on iOS it’s not as very good. For example, there is no multitasking support on iPad. The package managing relies on installing pre-defined “bundles”, which don’t tell what packages are included. On the Mac version of Texpad, we can choose between its own compiler or an external one like tex live. But on iOS, the former seems to be the only option.
Thanks for your feedback :)
Honestly, using that + iCloud syncing (+ Git, on my laptop) has been great: all of the changes I do sync across all of my devices, as do the PDFs, which I can easily bring up in meetings, while also having the plus side of git (diffs, general VCS niceness) once I get back to my computer and commit the changes to the remote repo.
Of course, unlike the OP, I'm not aiming to completely replace my laptop... I'm trying instead to augment my workflow to not carry my laptop to meetings, while waiting for people, etc.
This is the book itself: https://www.springer.com/us/book/9781441999900#aboutBook