Fast Search Text
Imagine that you have thousands of files and you need to quickly find text within them.
Fast text search will help you very quickly find the words or phrases in all of your text files.
Available search by words (terms), phrases, expressions, as well as wildcard and fuzzy query.
In addition to the quick text search, you can also read your files (built-in reader or text editor).
Supported only txt format.

version : 1.3

Required Android O/S : 4.0+

Google play link:    
https://play.google.com/store/apps/details?id=com.livecodedev.fastsearchtext