Ekee is described as 'Small GUI to display LaTeX expressions and then copy to clipboard or save the result. Ekee produces images interactively from LaTeX expressions. Drag and drop in several common formats (PNG, SVG, PDF, EPS) to other applications is supported' and is an app in the Education & Reference category. There are more than 10 alternatives to Ekee for a variety of platforms, including Mac, Windows, Linux, Online / Web-based and iPad. The best alternative is LyX, which is both free and Open Source. Other great apps like Ekee are LibreOffice - Math (Free, Open Source), MathType (Paid), KLatexFormula (Free, Open Source) and Apache OpenOffice Math (Free, Open Source).
LyX is a document processor that encourages an approach to writing based on the structure of your documents (WYSIWYM) and not simply their appearance (WYSIWYG). LyX combines the power and flexibility of TeX/LaTeX with the ease of use of a GUI.
Math is the LibreOffice suite's formula editor, that can be invoked in your text documents, spreadsheets, presentations and drawings, to enable you to insert perfectly-formatted mathematical and scientific formulas.
MathType is a powerful interactive equation editor for Windows and Macintosh that lets you create mathematical notation for word processing, web pages, desktop publishing, presentations, elearning, and for TeX, LaTeX, and MathML documents.
Math, part of the Apache OpenOffice suite, is a tool for creating and editing mathematical equations, similar to Microsoft Equation Editor (included in Microsoft Office). The created equations can then be embedded inside other OpenOffice.
VerbTeX is a free, collaborative LaTeX Editor. It allows you to create and manage LaTeX projects directly on your Android device and generate a PDF by using Verbosus (Online LaTeX and Octave Editor) "The Best Way to Type LaTeX on the Go" - androidappsreview.
LaTeXiT is a small utility that allows you to quickly typeset LaTeX equations, without bothering with file creation, preambles, and so on. The PDF image obtained can then be exported by dragn drop to any application supporting it.
Tex2Img is a free online Latex equation editor that converts Latex equations to high resolution images to embed in documents and presentations. You can also use Tex2Img to learn Latex by trial and error.