## External Licences

### Bundled Fonts

- OpenDyslexic by Abelardo Gonzalez is licensed under a Creative Commons Attribution 3.0 Unported License.
- Source Sans Pro and Source Code Pro have an open source license.
- Verily Serif Mono has an open source license.

### The Texpad Editor

This application uses code based on EGOTextView which is used under the following license:

    Created by Devin Doty on 4/18/11.
    Copyright (C) 2011 by enormego.

    Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

### License pertaining to Texpad's LaTeX engine, VVTex

The underlying LaTeX and BibTeX engines are built upon kerTeX-based TeX distribution with the following license (note that the text is a verbatim copy of the relevant section of file COPYRIGHTS.kerTeX in the kerTeX bundle):

    EXTERNAL SOURCES (reorganised for link with kerTeX), USED BUT NEITHER DIRECTLY INCLUDED NOR COVERED BY THE LICENCE

    Donald E. Knuth's whole system for digital typesetting (METAFONT, CM, TeX) and utilities, plus WEB, and, with Silvio Levy, CWEB. This software is still maintained by the author; but the licence permits the use, the compilation and the distribution of named results mf(1) and tex(1) if the implementation passes the torture tests. They do. [in "Knuth" sources]
    Silvio Levy for CWEB with Donald E. Knuth (Silvio Levy still maitaining as far as I know). ["Knuth" sources]
    Oren Patashnik for BibTeX (0.99d). (same type of licence as the one covering D.E. Knuth's work). Still maintained by author as far as I know. [bibtex sources]
    The NTS team for e-TeX (v2.1) : Joachim Lammarsch, Philip Taylor, Peter Breitenlohner, Jiri Zlatuska, Bernd Raichle, Friedhelm Sowa. Licence TeX one like. [etex "sources"]
    The AMS provided supplementary fonts and/or font formats (i.e. the CM related pfb files), version 3.02, are included here and are covered by the SIL licence. See OFL.txt. [ams "sources"]
    The Adobe .afm files for PostScript(R) base fonts were published by Adobe (retrieved from CTAN: Adobe-Core35_AFMs-315.tar.gz). The licence allow use, distribution etc. with the copyright. [adobe "sources"].

    BULK WORK OF WHAT IS DIRECTLY INCLUDED
    The main authors of the original code _included here_ were:
    Tomas Rokicki for dvips (5.76, was Public Domain) and dvips auxiliary programs.
    John Hobby from ATT for MetaPost (public domain 0.641).
    Donald E. Knuth for programs _included here_ with Tomas Rokicki for dvips auxiliary tools.
    Tanmoy Bhattacharya for the hyperbasics.tex macro file (public domain).

    The AUTHORS stands for:
    - The original authors listed above, for credits. But they have no responsability for the present resulting work.
    - Thierry LARONDE .

    kerTeX PUBLIC LICENCE
    version 1.0
    Copyright 2010-2012 The AUTHORS.

    Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
    3. All advertising materials mentioning features or use of this software must display the following acknowledgement:

    This product includes software developed for kerTeX by the AUTHORS.
    This advertisement must be conspicuous but can be made by directing the user to an easily accessible file listing the AUTHORS. For example, the generic sentence:
    This product includes software developed by third parties. See the file THE_AUTHORS for details.
    is OK.
    4. Neither the name of kerTeX nor the names of the AUTHORS may be used to endorse or promote products derived from this software without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE KERGIS PROJECT OR THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR ITS USE OR DEALING, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    YOU USE THIS SOFTWARE AT YOUR OWN RISK AND UNDER YOUR OWN RESPONSABILITY AND USING IT IMPLIES ACCEPTATION OF THE TERMS OF THIS LICENCE.

    THIS AGREEMENT IS GOVERNED BY THE LAWS OF FRANCE.

    RATIONAL: This present alinea is just informal. The licence has two main goals: give credit to the ones who have made the work; forbid the stealing of the credits from the authors, and of the work for the users, making what has been given mainly by Donald E. Knuth hard to find or to use. In clear: this licence is against ``mob programming''.

## Terms of use

- Texpad's cloud typesetters use secure HTTPS connection to transfer data from user's iOS device to typesetting servers and back. At the end of each typeset, this data is instantly deleted as the result (the PDF and the error log) is posted back to the user. No user data is persisted on Valletta Ventures' servers. In the case of any server failure, user data is deleted upon resuscitating, but no further guarantees are provided as to the security of this data.
- Valletta Ventures is not responsible for any loss of any data caused by a device crash.
- Valletta Ventures is not responsible for any loss of any data caused an interaction with Dropbox which may be affected by various factors such as poor communication channels.