Writing and compiling TeX files on the go. No internet connection needed.

- Supports both plain TeX and LaTeX, output PDF;
- Supports XeLaTeX (online compiling, requires PRO subscription);
- Fast compiler optimized for iOS devices;
- On-demand package auto downloader, including big packages like beamer;
- Integrated BibTeX/MakeIndex;
- Support multi-file project with comment "%!TEX root=main.tex"

- A text editor designed for LaTeX editing. With syntax highlighting, customizable assistant keyboard, powerful commands.
- Outline view. Works for multi-file project.
- Side by side PDF preview with auto reload after compilation.
- TeX-aware spell checking (cmd -> spell)
- Handy customizable assistant keyboard for inserting special characters.
- Open .tex file from other applications
- export & print pdf
- Customizable UI appearance (via twilit.l)

- Dropbox and OneDrive syncing, with file comparison and manual conflict resolution
- WebDAV
- PDF export/email

- Package download acceleration;
- Automatic eps-to-pdf conversion with online service;
- Payment will be charged to iTunes Account at confirmation of purchase
• Length of subscription is 1 year
- Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
- Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
- Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase
- No cancellation of the current subscription is allowed during active subscription period
- Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication"
- Privacy and Term of Use:

- Visit for user guide, and templates for russian, chinese, japanese.
- Email to send bug report and feature requests.
- Or directly talk to @litchiedev on Twitter.

What’s New

Version 6.0.1

- Fix crash when running on iPad Pro w/ iOS 12.2

Ratings and Reviews

4.3 out of 5
95 Ratings
95 Ratings
jyh_ ,

Version 4 really improves DropBox support

I use this app a lot to write notes and tutorials for my courses and it has been an invaluable tool for me. For anybody with memories of old implementations of LaTeX on Mac OS (for example OzTeX), the way this app. automatically fetches packages online when needed simply seems magical.
The one main weakness for me was the shaky DropBox support. Yes, it worked, but only as long as the DropBox folder was only used to push edits done on the iOS side. Any work done on the macOS side would invariably lead to conflicts that this App was doing a terrible job of solving (pretty much, the only solution was to flush the entire folder). Fortunately, v. 4 seems to have solved virtually all DropBox problems for me. It really works the way it should. Many thanks to the developer.
The only remaining minor irritants are that the editor is limited. Yes I know that I can modify the config file to change the presets, but it is somewhat cumbersome. I used to hate the copying mechanism that the developer seems to be very proud of... I just got used to it and it doesn't bother me as much as it used to.
Anyway, this is one of a handful of apps that are absolutely essential on my iPad and that I use every day. I Love it!

el-jablo ,

OK, but lacking

I can open and compile TeX files, so the app passes the most basic performance test. However, it falls short in a few areas.

1) The sync to Dropbox is clunky. For one, you have to do it manually. That would be fine, except the sync button is hidden under “open” for some reason. Why not have it on the main interface screen? After finding the sync button, I then spent 15 minutes trying to figure out why only the PDF and not the TeX file synced. Clearly the TeX file is the more important of the two. I had to close the PDF and sync again to get the TeX file to sync.

2) The lack of autocomplete is a hassle - and was a surprise. How could this have been overlooked? I am a professional mathematician and use LaTeX daily. At this point in my life, I know (or can look up) most commands. But autocomplete should be standard and for beginners it is essential.

Some positives:

1) There were no issues downloading the needed packages on the fly! (I haven’t tried Tikz yet, though.)

2) I love the split screen; using an iPad Pro 12.9 here and neither page is too small for my taste.

Even with the flaws, I’m going to keep using the app when I travel as it is good enough. If/when the sync is fixed to be more user friendly, I’ll update my rating to 3 or 4 stars. If autocomplete is added, I’ll give it 5+.

mdrichard05 ,

New Version is much better (Updated for Version 5)

[Written a few months before Version 5: Although some automatic sync isn’t great, it has much better version control. Incredibly stable and easy to use a wide-variety of packages (I was particularly impressed with how easy it was to make advanced geometric figures with tikz). Very happy I purchased it.]

I just recently updated to the Version 5. This was a massive improvement. The automatic sync is still wanting (as in, I need to hit “sync” whenever I think about it in order to sync my documents), but the editor is fantastic. Split view has made this a supremely useable and productive editor for myself. I still prefer TeXStudio on my computer, but on the go this is the best option.


Chaoji Li
65 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© (C) 2012-2018, Chaoji Li.
In-App Purchases
  1. Full Features $4.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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