Actually Texpad is mentioned in the article briefly.
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.
+1 on Texpad. It also integrates extremely well with File Providers. You can clone a repo of your TeX project on Working Copy, and then link the entire checkout folder in Texpad. Then, just edit and compile in Texpad, and switch back to Working Copy to commit and push the changes.
Just adding to this: TeXPad is what I use on both my laptop (when working on a big screen, though I mostly use Vim when working from battery) and my iPad mini 5 (+ a little bluetooth keyboard) on flights and before meetings.
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.
My Stellar Astrophysics prof wrote his textbook in TeXPad back in it's early days. Between that, his iPad, and a bluetooth keyboard case, he wrote the entire book over the course of 2 years I think. Aside from some final polish, diagrams, and various references, all text was written on the go.
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.